Owned not showing up in games library

try Power Cycling your Xbox by holding the power button for 10 seconds until it turns off completely then unplugging the power from the wall socket for 5 minutes.

plug it back in and turn on as normal and check your library again.

if they aren't showing but you can remember which games are missing, go to the Xbox store and see if they show as owned there and if they are available to download/install.

Do you own the game on disc or digital? If it's disc, then that will be why the game does not show in your library on PC, as you need to own the digital version for that to show up in your PC library.

Make sure the game shows up in the owned library. I hope you get it working!

It's also worth mentioning that it's not showing up in my "all owned games" section of Full Library

I am and on my xbox I own it and it works but doesn't show up on my laptop in my library and doesn't show that I own it on the store on my laptop.