my bo6 doesn’t install

When I go in with the disk inserted, mw3 does not show up at all, it won't even give me the chance to install or uninstall it anymore all that comes up when I put the mw3 game in is bo6, and when I put the bo6 game in it runs automatically like normal. Almost like my mw3 game is bo6 with a mw3 graphic on the disk and box it came in.

I even spent a day installing all the cod games made, and when I installed mw3 it installed as bo6 it never pulled the graphic up for mw3. I was just unaware of what bo6 graphic on the home screen looked like and assumed it was mw3, and when I search my games in my account mw3 is missing as if I never installed it but the disk I have says mw3 on it. I'm trying to see if it was a mistake from the company or what because I opened mw3 brand new out of the package myself so I know it's not a switcheroo

And I'll buy the vault for bo6

I'm playing in PC via game pass, only BO6, all games working nice without error, i unistalled the game don't remember the error like 000x00016 i need to install again, thank you for reply

if i downloaded it from steam i'll not be able to downlaod bo6 dlc right?