If we’re going to retcon Pasaana as a known planet, I believe it should be Jedha, as it was suggested many pages ago.

Both planets share their filming location (Wadi Rum, Jordan) and look very similar.
Jedha was a pilgrimage site for believers in the Force and a former stronghold of the Jedi. It makes sense for Ochi to go there and for Luke to follow him on his quest for Exegol.
The festival of ancestors could be turned into a a religious liturgy for any of the cults seen in Rogue One.
Immediately after their escape, the heroes hide in an asteroid field. It could be retconned into a ring of debris orbiting Jedha as a result of the Death Star firing on it.

The only challenges I see would be the redubbing of some dialogue where Pasaana is mentioned by name, and digitally altering the planet as seen from space (adding the asteroid field around it, plus a huge crater or chunk of floating debris where the holy city was supposed to be).