2nd screen resolution is a lot less than laptop

When I'm MS packages, browsers and a variety of other programs when I go from one screen to another, the resolution of the program (ie the menus etc etc) stays the same. With Acrobat, LR and any other Adobe product, the screen resolution is vastly reduced such that toolbars etc occupy a much larger proportion of the screen. Any guidance as what could be a solution would be appreciated.

I'm running the following:

Intel(R) Core(TM) i7-7700HQ CPU @ 2.80GHz 2.80 GHz

Edition Windows 10 Enterprise
Version 22H2
Installed on ‎29/‎11/‎2020
OS build 19045.3208
Experience Windows Feature Experience Pack 1000.19041.1000.0

Many thanks!