Wokness started out in comics before infecting gaming/movies and politics. Resulted in era of identity politics pandering and a hero replacement gimmick that had Thor, Cap, Iron Man, Hulk, Spider-Man (yes all of them) replaced one time or another by the designated oppressed groups. This heavy handed approach and disregard for actual focus on long running stories and history turned off long time readers. and then these critics got personally attacked as bigots/racists/xenophobes for their opinions. And then creators who objected to this woke trend got canceled and lost work at the big publishers. A consistent series of escalation.
This saga turned me off comics over a decade ago so I don't know what things look like today. But every time I peak in it looks worse.
Unlucky for Kamala khan, because she started out before all this with other expansion characters on side projects and was successful without replacing anybody in their own book. But unfortunately got dragged into identity politics later and it didn't help that her writer played it up.
Cap's mantle was handed down to Sam Wilson. People always say Bucky was Cap for a time but the mantle and shield weren't passed down to him... Cap was dead so he took it up himself. Steve GAVE the shield and mantle to Sam because Steve got old ... And Steve is still alive. And young again. He and Sam are BOTH co-Caps.
Mike Morales was a different universe Spider-Man. He became popular and is now in the main 616 universe WITH Peter Parker. The main 616 Parker never died and had his own series still ongoing alongside the Ultimate comics line with Miles.
Tony died and was later brought back. I'm spacing on her name but Iron Heart is her own character... Not a replacement for Tony. Just like War Machine wasn't a replacement for him... Even though he put on the IM armor when Tony was too drunk to be IM. And Iron Heart is also in universe along with Tony/Iron Man alive again.
The Mighty Thor wasn't a replacement FOR Thor Odinson. They both existed alongside each other. Thor lost his worthiness but regained it later on. Jane died and is now the new Valkyrie.
I didn't keep up with Hulk but there's multiple Hulks. Totally Awesome Hulk, I think, is still around while Bruce Banner's hulk is too... Along with Ross, Betsy and some others.
No one got replaced... At least not in the way you intimate in your post.