Microsoft Teams - Call not showing all participants

I have two screen shots take by 2 participants in the same meeting.

I have covered the participants faces for privacy reasons and have numbered the participants on each screen.

One screen shows 4 participants in the meeting, the other shows 6.

All participants could clearly hear all 6 people talking on the call, they just were not represented by their video or the usual circle with initials.

Both participants whose screens I am sharing are using the Teams APP and not a web browser.

Any suggestions please?