Yeah the Sith seem generally fairly inscrutable in their machinations. In the theatrical edition, a year has passed and Kylo has been using what he learned from Snoke to track down Sith artifacts in search of Palpatine after his big broadcast.

In my edit the narrative context is significantly different, with this taking place moments after TLJ Rekindled’s ending. So Palpatine has decided it’s time to bring his Sith Jason Bourne “in from the cold”, as it were. And then a year passes, and we see Rey training, etc, Kylo rebuilds his mask after being up to God knows what (assumedly assembling his bois and fetching his mask from the rubble of the Supremacy to complete his Vaderfication).