This is how you can find out which Windows 10 apps are DPI aware

[Windows Central]

Task Manager can now show you which apps are DPI-aware, and in this guide, we'll outline the steps to view this information on the Windows 10 May 2019 Update.
On displays, dots per inch (DPI) defines the number of pixels per each physical unit that make up a panel. Traditionally, monitors shipped with 96 pixels per inch, but as the technology evolved, companies began to increase the number of pixels in the same physical space resulting on screens with 200 and even higher DPI.
Although higher pixel density helps to ensure sharper images, a form of display scaling is required to size elements on the screen properly. Otherwise, visual elements and text will appear so tiny that they'll be difficult to use.

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[Dan Garrett]

The other idea is to change resolution instead changing DPI.