Northstar getting married got the same headlines as Kevin Keller getting married which got the same headlines as Batman getting married.No because Marvel clearly learned from that story. They've not been so much with other stuff.
Also yes the front page is, designed to get attention in comic shops and on shelves. I dunno I just don't find "Come see our shockingly LGBTQQIAA2+ character" to be in any kind of good taste because if the goal is to normalise LGBTQQIAA2+ people then treating a character as being part of the LGBTQQIAA2+ as some dramatic thing almost "come see the gay, see how the gay frolics about" well it's very much not normalising. It would be like major headlines every time Frank Miller had a character hook up in one of his comics (see Batman and Black Canary)
Also again there are literally thought boxes in comics so readers can read and have read for years some characters inner thoughts lol. Also the CCA eased off in like the 70s and while not fully abolished it was approving most things from that point anyway. It's also not like there aren't characters who haven't been explored as much especially their romantic leanings but those aren't the ones generally picked.
Comics generally put out headlines when major shakeups in relationships happen, it's just that weird nerds whine way harder about the LGBT ones.