My bad, haven’t checked in on whether it was still a beta feature in a while.
Strikes me as odd that the instances are accessible and can be inserted into parts without the beta feature enabled. There is also no mention of them still being in beta on the guide that explains how to use them (near the bottom). Had to go to the specific API doc on the PathfindingModifier instance to get a note that it was in beta… that’s what confused me.