Hi,
Please follow the steps and check if it helps:
How to use display scaling in Windows 10
You can find the scaling options by hitting the Windows key (or clicking on the Start button) and typing “scaling” into the search field. The setting you want is called “Change the size of the Apps on the screen”.
Windows 10 will open the display settings as below. If you haven't already connected your second monitor, you'll need to do that now before continuing.
Select “Extend these displays” from the dropdown menu, and tick the box to indicate which of the two is your main screen. Windows 10 also lets you virtually rearrange your desktops, so you can specify which monitor is on which side, and optionally
adjust the relative heights of your displays by dragging the screen images up and down. Once you've told Windows how your screens are set up, click Apply to save changes.
By default, Windows will use the same scaling for both of your screens. If you want to increase the size of windows on your second monitor, simply return to the Display settings. Click on the screen whose scale you want to adjust, then drag the slider
marked “Change the size of text, apps and other items” to the right to increase the size of windows. To save changes, just click Apply.
Display Scaling in Windows 10
Hope this helps and do let us know if you need further assistance. We will be glad to help.