Is it possible to change the title "Choose Activites" and also remove the search on the FamilyActivityPicker?
There's no supported way for you to customize the picker with the APIs currently available. If you'd like us to consider adding the necessary functionality, please file an enhancement request using Feedback Assistant. Once you file the request, please post the FB number here. If you're not familiar with how to file enhancement requests, take a look at Bug Reporting: How and Why?
