T'challa was retired because of "agenda", not to honor Chadwick Boseman
It never made any sense to me why they decided to to "retire" the flagship character from his own series rather than recast especially when you could never imagine this happening with any other iconic comic book character like Batman or Spider Man. Heath Ledger turned in an iconic & widely praised performance as the Joker, even being awarded a posthumous Oscar & yet the idea of the Joker being retired was never even close to being considered.
The decision was so unprecedented that I immediately suspected that there was a hidden, ulterior motive & "honoring" the late Chadwick Boseman was just a convenient excuse to remove the franchise's black male lead & turn it into a female led "girl power" thing & now apparently with alphabet agenda sprinkled in for good measure, if those reports are accurate.
I was already experiencing superhero movie fatigue by the time Avengers Endgame came & went so everything I've heard about Wakanada Forever so far has only made me less & less interested in it.