Total Commander

Hello, how does one select and open multiple files? %p%s does not work for me. I try to åpen several files with vlc.

First of all: There is no parameter %p%s for TC-Android. You may use %P%S (capital letters) as stated in help.
Next: Does VLC-Android support multiple files at all?

sure, capital letters.

I am also unable to "enque" multiple files to TC audio player.

What would a loop in the shell look like? Maybe Its possible to write a script?

No problem here with TC audio player.
Just select some files by a tap on their icon.
Next tap on TC audio player icon in button bar.
Alternatively you can tap long on a selected file and pick "play selected" from context menu