Support for lower resolutions for portable PC's

I know it isn't supported as such, but as smaller portable pc's are becoming popular, it's more and more desirable to be able to run the game at a lower resolution. Case in point is the SteamDeck, which I have been able to run GalCiv IV on. My problem is that many UI components don't scale down, so you are left with UI windows that you can't click on because the overlap others. I can force a higher resolution such as 1920x1080 and the Deck will scale it down, but you end up with bad performance. In comparison, I have no issues running Stellaris and Endless Space 2, albeit with small text and some small UI elements. Please consider supporting a more scalable UI for this aim. Thanks.