Hi!
I'm using the latest available version of this extension on the gnome extension website, on gnome-shell 3.36.2.
Am I lost in the settings or the rounded corners can't be shown if this extension is used?

Hello amivaleo, thank you for the report! This is unintended, I always forget those corners when testing :facepalm: (I'm using the arc-dark theme, which has no corners). This is now fixed on the master branch, could you please install it and confirm that the corners are there? Thanks!
Now they are back.
But another thing needs some fixing (sorry 😄️):

When Actvities or the the system-menu buttons are clicked, the blu underline follows the curvature of the corners.
I know this is just a very tiny thing. Can you fix it if it doesn't require too much effort?
Ha yes I remembered why we removed it initially, it is causing graphical glitches unless the system menu is at the far right or the panel (stock gnome-shell). I added it back on the master branch so it should now work in that situation only (like in your screenshot). Could you please pull/install again? Thanks!
Now it works fine in my specific case. I see it wouldn't for those users who put the clock at the end of the panel: in that case, the blu underline below the clock doesn't follow the curvature. 😄
I truly understand why you chose to get rid of this. :)
Thanks for the feedback, yeah the following is what happens with the date menu on the right:

Or with the "Show desktop" button:

This is mostly a reminder for myself of why I removed it for elements other than the system menu :)