Is this mod bannable?

https://www.nexusmods.com/pathofexile2/mods/1

Would appreciate official response from GGG. Or link about GGG statement on this mod.

Use it but keep yourself quiet about. The game's performance is really bad. If there is something to improve the flawed work then it is valid.

No, it isn't something they would ban for.

the mod removes the ultrawidescreen restriction ggg put in place in poe1.
wouldn't recommend using it.

ggg almost always denies the whitelisting of tools cause they would have to permanently recheck every change developers made to those tools