Look, unfortunately I can't add the anchor points manually.
It would be a very long and inefficient process, especially since any engine allows you to adjust pivots in a heartbeat.
Usually, you don't need to move the point on every single frame: you just set it once on the root of the sprite and all associated animations will detect it automatically.
Calibrating and recentering assets depending on the game engine is a completely normal procedure.
Here is a quick test: same sprites, but with the pivot manually repositioned across the entire set. It takes just four seconds in total.
https://gd.games/barelyapes/the-ogre
If you tell me which engine you are using, I’d be happy to help you figure out how to move the pivot quickly in just a few clicks!
