New update and my realms have disappeared!

I updated Minecraft today on my Pixel 9 Pro, and it automatically put me in Beta mode. But the worrying thing is that my realms seem to have disappeared! There was just a message saying a new Beta realm was available to me, so I clicked on that and it created a new world, but then when I came out it was the only world on my realm. Where are my other worlds? Please don't tell me my main world has been deleted!