thanks for the help, I tried it on ubuntu 23.10. It worked, but it was super laggy to the point that it was unplayable. I don't know why it works on ubuntu and not Pop! OS.

That lines up with what I'm seeing. It starts downloading but then just stops (internet traffic seems to stop too). No popups as far as I can see, even tried restarting the PC to kill any processes and only opened FAF, but the problem happened again. It shouldn't be a firewall issue as I have whitelisted the FAF client and it still happens when I disable the windows defender firewall (uninstalled other antivirus software).

This time I got a few more errors in the log, not sure if they're related to my issue though:

client (2).txt

Appreciate any suggestions for fixes 🙂

That sounds like the game creates new units based on the BP of the units in full share. Would be the same base issue as upgrades done post creating of the units not feeding into the veterancy bonuses I saw somewhere else.
There is some mod that transfers all your units to one player automatically when you die, that idea probably could be merged into the full share function to allow for a better full share feature solving this issue.
Maybe the Game Team can investigate the viability of my proposal and implement it if feasible.

There's nothing useful in the log that would be pointing to the cause of the crash

If it was a crash-to-desktop then you can try and attach the debugger:

If you do not have Discord, here's a screenshot of the post:
fdb7136e-4a5f-45e9-bdcc-7ed4d58212ee-image.png