Anyone help me Why My elements are not show but if scan my mobile my elements are show in my mobile but not in my mit app inventor

Bugs and Other Issues
1

Screenshot (175)
Screenshot (175)1920×1200 162 KB

2

Can you use the scroll bar in the Designer screen mock to scroll down?

That might help you see the lower components.
088206b981c02b5ceaeb647e95a0659967ea57d2_2_690x431

3

To see 'non displaying' components (that are not hidden) in the Designer that are not visible using Phone size, temporarily select
tabletsize
Tablet size; look, then reselect Phone size. :