yeah idk what to do though

I had the same problem but I think I fixed it the think is the game can only show 142 maps all maps after that simply wont be ther but they are installed that fixed it for me hop that this helpt you

But i have at most 15 maps, and this is still not showing. I've tried everything.

i fixed mine by going into a privet game and it showed up and i clicked it then boom it took me to the main menu and said mods injected or whatever try that