I would leave Fett’s “death” alone as far as what the original cut of Jedi showed in terms of him falling into the sarlaac with the belch. If money and talent were available to have a tentacle wrap him up and drag him into the belly - then that would be fitting.

The only thing I wish that could get the ‘Adywan treatment’ in that scene, would be for Luke to be the one whom sends Fett into the Sarlaac. Perhaps after he cuts the rope Fett shoots around him with his gauntlet, either Luke flings his saber or he swings it and hits Fett’s backpack to send him off the Skiff and into the side of the barge. The whole ‘joke bit’ with Han, being blind and accidentally hitting him with the pike pole was ludicrous - even at the Midnight premiere on May 25th 1983. Everyone groaned - no one laughed. Even then. Plus Luke damaging his jetpack would lend itself to his fate more believably that Han hitting it with a pole on accident.

So we do not need to see Fett’s survival now covered in the TV show on Disney+. As far as the story goes, having Fett taken out of the equation is all the story needs to tell.