How to make an application made in Unity available for download in the Play Market for all types of phones, and not just for API 26?

Question

Android

The problem is this:
After publishing the game in the Play Market, accessing the link to the store, I get "not supported on your device" (I have 5 android). Prior to that, before uploading the file, Google rejected sdk version 25, requiring a version of at least 26. It uploaded 26. Everything is ok. In the available devices - about 2.5 thousand available (on which you can download my game) BUT NEITHER MY DEVICE NOR THE DEVICES OF MY FRIENDS ARE SUITABLE (they mostly have 6 androids).
But the same Granny, for example, supports all formats, up to 4 (level 22-23). How so?
What to do?
What's the use of my manifest file if they still require a minimum of 26 (android 8)? Or are there loopholes?
Here's a link to the game for proof:

https://play.google.com/store/apps/details?id=com.liladynkina.theknightstale

Answer 1

When building an application, the minimum and target API levels are specified in the settings.
From August 1, the minimum target will already be 28.
Google Play refused to accept apk because apparently the target was low, and the minimum can be set to anything, as long as you have compatibility with these devices.