I want the health bar amount to be the same

I would like for the health bar amount to be same in all of my scenes. How do I do that?

you have to use global variable.
set global variable healt (number) to desired health value.
point your health bar max value = to your global variable.

Can you give me a video walkthrough on how to do it?

Or give me a screenshot of the exact thing to do?

first follow this and create a global variable (number) …input a value
https://wiki.gdevelop.io/gdevelop5/all-features/variables/global-variables/

after that change lifebar value to your global variable
Immagine 2025-08-16 015043
in parenthesis put your global variable name.

this if you are using a scene for each level.