Apparently the only games, out of the 10 games or so which have been FPS Boosted so far, only 2 of them have problems, both Fallouts. Skyrim is 4k, the same as on OneX, Prey 1440p, same as on OneX, and so on.
Ther are numerous potential reasons why its not worked well on both Fallout games, suh as a lack of time due to the games hitting Gamepass, some kind of problem with the version of Bethesda's engine that Fallout 4 and 76 use etc.
We know there is a mod that makes Fallout 4 4k/60 on XSX, so its obiously not power related. Hopefully its something that can be patched or improved over time.
And as i said yesterday, 'FPS Boost' is a free workaround that Microsoft could of easily not bothered doing, and left all these games at 30fps. Its free, and framerate is king at the end of the day.
Its weird to moan about something like this.