Disappearing of resources and villagers and farms

When I open my world I spawn into a another location and when I come back to my base I am stunned to see that my worlds half resources like my villegers my tree gardens my XP farm my food farm and also many more has disappeared from my world. Please give back those resources which I have before 🙏 I give long time and hard work to this base . Please give back my old things as soon as possible and solve the bug please 🥺🙏