@3 feedback:
couple annoying things,
being switched back to the "for you" tab constantly
(might be nice for users to have a default tab, or to set tabs if users can create different feeds, like lists on X)
The auto play audio coming back on constantly, just like X has recently introduced, its annoying AF when i want to scroll in silence.

Also there was an issue, when scrolling the sound played for a video, i muted the video, i clicked the new messages button, the page reloaded, the sound started playing on the now off screen video i muted, but now the post was many scrolls away and i had to scroll down to find it to mute it again.