Teams meeting only 4 out of 5 attendees show on screen

HelloWanda_Wagner 

welcome to the Microsoft community, my name is Recep I'll be happy to help you today.

I understand that teams meeting only 4 out of 5 attendees show on screen, please note that in the new meeting experience when I believe there are 10 or more participants, regardless of how many have a video feed you will have the option to switch into large gallery view.

You also get together mode 5 or more, which I highly recommend checking out.

To have the new meeting experience you will need to ensure your teams client is upto date. Normally happens automatically. Click on your profile icon/ initials, settings, check the box for new meeting experience and restart.

A telltale sign that you might already be using the new experience and therefore just need to choose the different options when in a meeting is if the meeting starts in a separate window.

I also want you to try the below and revert with an update.
1. Swap gallery mode
2. Swap to Together mode
3. Turn off all incoming video and then turn on again