Android device compatibility on Google Play

In my current release I only have 1,667 devices supported. I am trying to research ways to increase compatibility, but things I'm trying aren't giving me a different result. I had to build the game with API level 29, could this be the issue? I've also tried changing the texture compression from "don't override" to ETC, and tried changing the resolution scaling mode to Fixed DPI. Another method suggested changing settings in android.manifest, in the assets>plugins folder, which doesn't exist in my project. If anyone has some experience with this help would be appreciated