Instructions 
https://www.howtogeek.com/232726/how-to-install-the-google-play-store-on-your-amazon-fire-tablet/#download-the-play-store-files

Install order
Google account manager7.1.2-25_minAPI23(nodpi)_apkmirror.com
Google Play services 25.06.32 (100400-724425688) (100400)
Google Services Framework 9-4832352 (Android 9.0+)
Google Play Store 44.9.19-23 [0] [PR] 725679144 (nodpi) (Android 6.0+)