I use fdroid and aurora stores but lately I’m having this message for apps installed from aurora that are also available in play store.

Is this a thing enforced by android or by the apps? Is there a way to circumvent it?

I have bought a brother laser printer 8 years ago. It just stop working, because of a know problem of not turning on. There’s a workaround that a used, and lately let it always on, but it finally stopped working, even with the workaround. Although it was a good printer because I would have spend many times its value if I had used the cheap ones. I also have a xerox and canon laser printer and so far so good.