How to book all members of a team at the same time from the same booking page?

Create the team with the right members

Create an appointment type or choose an existing appointment type that you want to convert into a team appointment type

Go to the Description settings of this appointment type

Activate the “Team appointment type” feature

Choose which team you want to assign the meeting to

Activate the "Book all team members" feature

Don't forget to save your changes 😉