Issue with Android indoor location app


I need to make Android app, but when we test, Android app does not show the right location, iOS version shows the correct location though.

Is there any issue like this? indoor location of Android version seems less precise than iOS.

If you have faced with this issue, how have you figured it out?

I already searched for solution, but I need to make Oreo version, so this might not be the right solution for me.
Is there any advice?
or someone who has references for indoor location app with Oreo version ?