What does "Queue Present" mean in the RHI thread of Unreal insights?

I am extremely confused.

I am currently working on a mobile game in UE5.5 and hitting some pretty severe performance drops. To determine the issue I’m using unreal insights but when looking at the tasks, both the game thread and render thread are waiting or idle so therefore don’t appear to be the problem, the RHI thread may be in the same boat but I don’t know.

So my question is, what does “Queue present” on the RHI thread mean?