From experience, most apps/packages that are compiled for Linux are compiled for both x86 and arm. I’ve had no real issues getting software on my OnePlus 6 running on postmarket os (full Linux os on a phone basically). This is very likely because ARM is a thing in the server space, so most packages in your distros repositories will be compiled for all architectures (and that’s if it’s not required by the distro’s repos to have the two supported).
Other software ftom outside the repos where linux was already a second class citizen like discord or Spotify may be troublesome though