For Olivero, this could be a feature request rather than a bug. The Media Lib...

For Olivero, this could be a feature request rather than a bug. The Media Library dialog was never themed in Olivero. Also, could someone provide the steps to reproduce this issue without using any contrib module?

Here, I have attached a screenshot from an earlier version (10.x), and it is broken on that version as well.

Note: I am using Olivero as the admin theme to reproduce the bug. However, we do not support using Olivero as the admin theme.