There is no changing in practice after the unfolding of sotāpanna

The practitioner no need changing the practice.
The practitioner has to comprehends 3 characteristics of 5 aggregates, which cycling as the dependent origination, from being ordinary until arahatta-magga. But the teaching literature may be difference. See the description after the below quote.
So, in Sutta. Saṃ. Kha. Sīlavantasutta taught the same meditation for all people, ordinary and all noble one:

On one occasion Ven. Sariputta & Ven. Maha Kotthita were staying near Varanasi in the Deer Park at Isipatana. Then Ven. Maha Kotthita, emerging from seclusion in the late afternoon, went to Ven. Sariputta and, on arrival, exchanged courteous greetings with him. After an exchange of friendly greetings & courtesies, he sat to one side. As he was sitting there, he said to Ven. Sariputta, "Sariputta my friend, which things should a virtuous monk attend to in an appropriate way?"
"A virtuous monk, Kotthita my friend, should attend in an appropriate way to the five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. Which five? Form as a clinging-aggregate, feeling... perception... fabrications... consciousness as a clinging-aggregate. A virtuous monk should attend in an appropriate way to these five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. For it is possible that a virtuous monk, attending in an appropriate way to these five clinging-aggregates as inconstant... not-self, would realize the fruit of stream-entry."
"Then which things should a monk who has attained stream-entry attend to in an appropriate way?"
"A monk who has attained stream-entry should attend in an appropriate way to these five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. For it is possible that a monk who has attained stream-entry, attending in an appropriate way to these five clinging-aggregates as inconstant... not-self, would realize the fruit of once-returning."
"Then which things should a monk who has attained once-returning attend to in an appropriate way?"
"A monk who has attained once-returning should attend in an appropriate way to these five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. For it is possible that a monk who has attained once-returning, attending in an appropriate way to these five clinging-aggregates as inconstant... not-self, would realize the fruit of non-returning."
"Then which things should a monk who has attained non-returning attend to in an appropriate way?"
"A monk who has attained non-returning should attend in an appropriate way to these five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. For it is possible that a monk who has attained non-returning, attending in an appropriate way to these five clinging-aggregates as inconstant... not-self, would realize the fruit of arahantship."
"Then which things should an arahant attend to in an appropriate way?"
"An arahant should attend in an appropriate way to these five clinging-aggregates as inconstant, stressful, a disease, a cancer, an arrow, painful, an affliction, alien, a dissolution, an emptiness, not-self. Although, for an arahant, there is nothing further to do, and nothing to add to what has been done, still these things — when developed & pursued — lead both to a pleasant abiding in the here-&-now and to mindfulness & alertness."

But the teaching literature may be difference. Each enlightenment depend on each personal understanding-ability because each person has difference own understandable dhamma, i.e. Pañcavaggī were professional of aggregates before he meet buddha, but Dīghanakha were professional of six sense fields before he meet buddha, etc.

• Dīghanakha enlightened nibbāna as sotāpanna by comprehending 3 characteristics of the dependent origination (nāma-rūpa) in Sutta. Ma. Ma. Dīghanakhasutta.
• A thousand jaṭila enlightened nibbāna as arahanta by comprehending 3 characteristics of the dependent origination (six sense fields, six contacts, six feeling) in Sutta. Saṃ. Saḷa. Ādittapariyāyasutta.
• Koñḍañña-pañcavaggī enlightened nibbāna as sotāpanna by comprehending 3 characteristics of the fourth noble truth in Sutta. Saṃ. Ma. Dhammacakkappavattanasutta.
  • All pañcavaggī enlightened nibbāna as arahanta by comprehending 3 characteristics of five aggregates, which is continuous from the five clinging-aggregates suffering noble truth of Dhammacakkappavattanasutta above, in Sutta. Saṃ. Kha. Anattalakkhaṇasutta.