Checkbox in google sheets with condition?

Question

Google Sheets

Good afternoon. Please tell me how to implement:

If there is any information in column "B", then the flag (False) should be inserted into cell "A2"?

Answer 1

https://www.benlcollins.com/spreadsheets/google-sh...
might help)

Answer 2

1) In A1: =ArrayFormula(B:B<>"")
2) Select A:A
3) Insert - Checkbox

Answer 3

The task is not very simple, because the insertion of data validation occurs in an abnormal way. But everything works, just assign the desired validation to the results of the formulas in the cells

https://docs.google.com/spreadsheets/d/1OlbkEDvUA0...
How to copy the validation.

1. Install validation in any cell of your data
   
2. Copy this cell
   
3. Highlight your range of results
   
4. Do a special insert - only validation