Worlds gone after updating to 1.20.70 on windows 10

Hello,

My girlfriend and I have been playing a lot of minecraft together recently and we have built quite a world by now. This afternoon I was notified of an update and I updated my version. And she updated hers. After the update our world has seem to dissapear. I've checked my files, also the hidden ones, and there is nothing. Just absolute blankness. I really need the world back. Does anybody have a suggestion?