After I schedule a meeting in Proton Meet (or Calendar with a Proton Meet link), I am unable to edit the scheduled meeting to change settings such as "enable waiting room". When I click the edit button in Proton Meet, I get redirected to my default browser and the Proton Calendar page opens up instead.

I noticed that to change a scheduled meeting to enable waiting rooms, a user has to join the meeting, then enable waiting room, and then either start or exit without launching the meeting.