A save bug that takes an old save and calls it new

If u have ur xbox account on 2 consoles but only play on your console when you play on the other console the worlds bearly load and the ones that do are way out dated for me i was lucky and my oldest world loaded it was 1 to 2 years out of date when i went back to my console it loaded the very old save and called it recent now all my progress is gone but i still have all my netherite from the 2 days prior when the save was up to date but all the towns and massive buildings are gone ive probably placed over 50,000 blocks since the save ive been thrown back to and im starting to feel like ill never see them again