Developers Polyarc Games have released the Moss Update 1.000.003 for the PSVR2, addressing an issue with chapter selection.

Moss Update 1.000.003 Patch Notes | Moss March 1 Patch Notes

Size: 276MB

While Polyarc Games have yet to release full patch notes, we do know that this update is related to a bug that they confirmed would be fixed this week. That bug is one related to chapter selection, where players who completed the game could no longer select which chapter to play on. 

We're pushing an update this week to fix that. Sorry for the inconvenience.

— Moss: Book II – The Game Awards "Best VR/AR Game" (@PolyarcGames) February 27, 2023

A small but quick fix, thankfully. For those wanting to go back to a chapter and mop up some of the remaining trophies, it seems you should now be able to do that. 

Moss and Moss: Book II are now available for the PSVR2. 

Source: Twitter