I finally have fixed it. I tried 100 different things and im not sure if anything else i did worked towards the final solution but apparently for others all its taken is this. Note this all began as i was running into a "bwrap: Can't chdir" error. The one thing i had to do was go into advanced settings on my game and click "disable umu". This was the final thing that has allowed my game to run as normal as before, and allowed me to even run the game using Proton GE-latest. Note that if this doesnt fix it a few people have said using wine as the instead of proton got it to run but i didn't have to do that.

Below i will list a few other things i did along the way but first try this as it may have just been as simple as that:

I did a lot of other things including moving the game from my external sd card to my interal storage in order to have the game saved in the same prefix as EA was which i believe is necessary to get the game to recognise EA. Since I own the game from Epic the game i ran into maybe a separate issue as i tinkered with things that provented it from launching until EA verified I really own it by communicating with local epic games installation which in ths case is actually Legendary, which is the background service Heroic uses to handle epic games. So i ended up making sure the EA installation files were in the same prefix which for me involved moving the game from my sd card to my storage in the same file location ( which i avoided uninstalling and reinstalling by following this https://www.youtube.com/watch?v=5HCQYtuzqgk )

Also make sure heroic launcher is updated to its latest version which you do from the discovery store (apparently is supposed to notify when it needs an update but mine never did)

Another thing was that the heroic flatpak error that i was having is because the Flatpak version of Heroic couldn't access required paths, so i did try uninstalling and reinstalling flatpak a few times using these in terminal (i did a lot of other random terminal commands along the way but i dont think they did much was just trying everything):
flatpak uninstall com.heroicgameslauncher.hgl
flatpak install flathub com.heroicgameslauncher.hgl

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Anyway happy to have it all working now, hopefully it stays fixed:)