Why are objects missing in Blender?

Question

3D

Everything in the Layout tab is gone . Everything is there in modeling and sculpting. Most likely an unplanned push. How to solve the problem?

Answer 1

You have clip start and clip end equal to each other.
Set clip end = 5000
This is the top right corner of the viewport, the View section, just below Focal length
clip start is the minimum distance to the camera, end is the maximum.
Anything closer than clip start and further than clip end is not shown.

Answer 2

Check if there is a checkmark here