I have the problem that some off my software installed appears too small.
This does not happen with software that was already pre-installed, or my browsers Vivaldi or Brave.
However, the Steam app is so small that I cannot read it.
This also happens with IrfanView, which I installed with Wine. But I thought it is because of Wine. But the Steam app is a native Linux app (so not the Windows app).
If you scroll down to @Aravisian's reply, you'll see that he pointed out that some apps use Electron, which makes them look small on displays that are at least 1440p. My Mac is included because its display is 2500x1600.
Interesting I installed Gnome Tweaks on my Cinnamon DE and it shows my desktop theme and cursor style which are both custom .... not sure about other settings as I don't want to screw anything up ....
Please note that fractional scaling is not perfect and we see display issues reported on the forum as a consequence of use of fractional scaling.
If you encounter bad display behaviour, please declare that you are using fractional scaling, should you need to seek help and advice here. That may speed up fault diagnosis.