They’re not going to retcon the Sequel Trilogy. Like how the previous generation had to come to terms with the prequels being forever a part of Star Wars, the current generation will have to come to terms with the sequels. There’s hope for them to be slowly improved and augmented with ancillary material - what you could consider a slow retconning, maybe - as the prequels were…
I absolutely think The Mandalorian is doing that, in the same way The Clone Wars did with the prequels. We’re seeing the New Republic through its soldiers, which should make its destruction in The Force Awakens more compelling, and it’s clear that the core worlds are being complacent about Imperial remnants, so we’re seeing how the First Order begins. We never saw Luke’s painstaking efforts to create a new Jedi Order onscreen, but now we are, and it should make his self-exile more powerful - we get the sense he’s worked for years to build this, only for it to come crashing down upon him because of his own mistake, and fear. We even saw force healing in The Mandalorian around the time it appeared in The Rise of Skywalker, and I feel better about the new ability because baby yoda does it!
There’s no chance in hell that LFL are going to retcon the sequel trilogy - they’re connecting it.