I don't know if just linking the game is ok, but since you are working in UE5, it isn't a surprise that you have a large game. I would definitely try to shrink down textures as much as you can (those typically take up a lot of space) and remove anything that you don't use or intend to use in the final game.
You should also wait for Bad Ideas to respond and maybe (if applicable) ask this in discord, if you have an account.