Have been following this, we can hope it turns out to be true, but it seems very difficult... Not impossible of course: lots of franchises have decanonised movies in various ways, either with time travel (X Men, Terminator, Star Trek) or by just choosing to ignore the films they don't like (Superman, I believe RoboCop and Cloverfield are getting this treatment as well). So it wouldn't be unprecedented. But harder to do so soon, and in such a high profile way.
I think the vastly more likely outcome is that they just sort of ignore the entire sequel era for the foreseeable future, focus on the imperial era, the distant past or the immediate aftermath of Endor. That's already happening: think about the projects they've announced or released lately: the Disney+ series are Cassian, Obi Wan and Mandalorian, none of which will touch the sequel era proper. Jedi Fallen Order was Imperial era, Squadrons is going to be imperial era, this High Republic thing is Republic era. Resistance was cancelled, all the upcoming comics and all but one of the upcoming books are non-sequel except the RoS adaptation and an anthology or two of released material. And this is all, what, less than six months after the last movie came out? They're pretty clearly not pushing them very hard at the absolute least.
So, I guess I live in hope but expect little.