When you follow the steps outlined on the documentation page:
https://help.jiraalign.com/hc/en-us/articles/115002929134-Create-solution-teams
it does not create a team of the type "Solution Team" but a team of the type "Process Flow Team".
In addition, document the meaning of the sentence "Members of the parent portfolio and children programs inherit membership to this solution team.” we see in the "Members" tab.