moving from macbook pro to imac- resolution/resize issue

I made a project on my Macbook pro, (HDMI- 2016) all the mapping masking etc. when I transferred the files to the theater's computer (iMac-2019- USCB-c >HDMI) the resolution and the size of the masks changed...

any idea?

Is it because of the HDMI to USC-c adapter? or it is the computer's resolution difference?

How can I fix the issue without remapping the whole layers?