WWE 2K23 Championship Titles: Full List of All Championships

I think you answered your own question in a later comment you posted.  My guess is that WWE doesn't own the rights to the Championship and thus can't put it in the game.  However, unlike the Television Championship (where there has been various incarnations of the championship and at least one version SHOULD be in the game) there was only one version of the WCW Women's Championship.  I believe the rights to that championship is held by whatever entity absorbed the assets when GAEA (Japanese wrestling company that worked with WCW on the Women's and Women's Cruiserweight Championships) went out of business all those years ago.

Sidenote rant: There's absolutely no reason to NOT have a version of the WCW Television title in game.  I get Duggan may own the last used design of the championship but there's been various incarnations, including my favorite design when Regal/Orndorff/Steamboat were champions in the early to mid 90s.  Really wish they'd put that in someday in these games.  Such a slap to the face that a crap title like the Hardcore title is in but not any version of the Television Championship.