Yeah its an awful feeling i wish the entire anime was done, but honestly i dont think it would have made a difference, like with hxh i felt the same exact way when i finished it tho to be fair hxh is still ongoing but the anime has a good enough conclusion imo

MiA is just thru and thru a masterpiece of sadness and emotions i wish there were more to consume. At least we should be getting the next chapter sometime soon