-rwxrwxrwx so exec bit already set. I am running quite an old Debian 11 (Bullseye). It runs Godot 4.4.1 no problem. Your gltf_pack probably needs a more recent linux. I suspect it will work on Bookworm and will give it a test soon.
There is a minimum glibc version that you need for it to work on Linux. I think whatever version of glibc that ships with Ubuntu-22.04 is the minimum version it supports.
