Whenever I open the “my stuff” tab, it just displays a white screen; none of my projects are appearing.

definitely bad connection, this is the 3rd time ive seen a post like this
check your internet or reload the page

This bug has been extremely prominent recently, discuss it here, instead of making a new topic!

Pretty sure this is an issue with scratch. I scrolled down page 1 and 2 on Questions about Scratch and found 4 different topics on this issue.

https://scratch.mit.edu/discuss/topic/756843/
https://scratch.mit.edu/discuss/topic/756830/
https://scratch.mit.edu/discuss/topic/756829/
https://scratch.mit.edu/discuss/topic/756754/

I could most likely find more if I wanted, those are just four I found across the two pages.

pretty sure it's bad Scratch lag (known issue). it wont show up until your little account logo shows up on the top right. annoying, yes i know