I have to admit I don’t have great knowledge on this and if someone who knows more wants to add something, they would be more than welcome.
If I look at PathfindingLink documentation I see it has a property Label which is automatically included in the waypoint that is generated. So you know the model the Pathfinding Link is built into and you can add a label which is added to the waypoint. Is it not possible to make the label sufficiently unique that you can look up the model from it?
I’m imagining that you give each model a unique name and set that as the PathfindingLink label?
Character pathfinding | Documentation - Roblox Creator Hub seems to give an example of using a label to add a location specific process to the waypoint, perhaps you can adapt that?