Search:

https://drive.google.com/file/d/1mkv5OWZ1Z52Ch0mp9b5yFbWqPRMfYF4_/view?usp=sharing

I mis-remembered, it's a setting to NOT share data. Maybe you accidentally checked this box at some point?

If...

Hi Princess, Have you made sure to check the option for the project to share data/variables with sub-aps? I'll update this reply shortly with a screen shot.