I am using the file BBOutlineReloaded-2.6-1.20.1-fabric.jar with the VanillaTweaks Anti Enderman Griefing datapack for 1.20, and for some reason BBOutlineReloaded-2.6-1.20.1-fabric.jar is causing the datapack to not work correctly. Essentially the datapack removes the "enderman_holdable" attribute of blocks endermen can pick up, such as grass blocks and gravel. With this mod installed, that attribute still shows up, and endermen can still grief.

The first image is with no mods, the second image is after adding BBOutlineReloaded-2.6-1.20.1-fabric.jar