I’m generally not a big fan of the SF “glass” look, (I’ve ranted about it for years), but it is nice in certain situations… In a file manager, though, (and a text editor, which most devs seem to agree with)l I think especially that a solid bg is better, because it takes away any visual confusion / obstruction.
for example, here’s my tweaked skin for Mixplorer on Android
I had modded my Fileman qmls to be similar, using code for background, rectangle, etc,u but then Fileman got dropped, and so I statted using File-browser … I think a solid bg and colors for different elements is helpful.