Galery View

Hi madepur 

According to this Microsoft article https://support.microsoft.com/en-us/office/using-video-in-microsoft-teams-3647fc29-7b92-4c26-8c2d-8a596904cdae It says: 

Gallery

The default view when you join a meeting on desktop or mobile. If there are more than nine others in attendance, Teams will prioritize the people who have their video turned on, as well as those that are speaking the most.

For people that haven't turned on their video, we'll show their profile pic instead (or their initials if they haven't added one).

Large gallery

Enables you to see the videos of up to 49 other people at once. This option is available when at least ten people have their cameras turned on. If no one is sharing video, Large gallery won't be selectable in the menu.

While in a Teams meeting, select the three-dots icon. If not grayed-out — that is, 10 or more videos feeds are active —  select Large gallery. 

Note: To experience this, the user needs to check the box for the new meeting experience which is under the settings. In the top right of teams, click on user picture > settings > Turn on new meeting experience.

Hope this helpful.

Regards,