Large gallery in teams on diffrent devices?

Hi.

We have a large meeting once a month with 40-45 users. The users need to see everyone, and to solve this we are using the large gallery.

Our users uses a wide range of diffrent devices and for a lot of users the large gallery option was not avalible. PC users can enable "new calling an meetings experiences" but when you are on the teams app on other devices thats not possible. Any other suggestions to why large gallery is missing? 

Another sidenote is that we use focus to select the current speaker. For some users the screen just turns to black when we use focus. Any one seen this? It happens randomly to diffrent users. 

In the best of worlds, we could force the current meeting to use large gallery for all users, and with autofocus on the current speaker. 🙂