As for your inquiries, I used a phone with 2556x1179 pixels for screen resolution. I did manage to get a photo of the chat box with the Live Caption enabled, but it doesn’t show the issue I had during the time. Specifically when I clicked to type, the keyboard will pop up taking up the space to where the point where I couldn’t see the chat due to the caption box covering it & if I want to see the full transcript in full screen to keep up with the dialogue happening from different people, I’d have to sacrifice my typing to read the transcript.
It’s a hassle, but what I ended up doing was use my computer to join the cornychat using the room link, enable the Live Caption there, and read the the full screen transcript while using my phone to type what I wanted to say in the audience without any major complications.
To visualize the UX difficulties for the phone by itself, I’ll try to screen-record for better clarification. Maybe that’ll help from a dev point of view
