My only work around is to re-texture the assets individually in Blender manually which is just not practical as there are thousands of assets of varying complexity.
Given that Asset Forge was written in Unity and the functionality is clearly there... is there any intention to add UV map support to AF in the distant future?
Other than the models from the Collections and blocks thread and the Kenney assets, I've not really had much success with other third-party models which is a shame.