Manually updating Android on an outdated phone?

Hello, I have an ancient Android device. Is it feasible to update the Android version manually? The system update believes that the phone is up-to-date, but I am aware that Motorola ceased updating these devices several years ago. DJI Fly is a drone app that I want to use, but it requires Android 7.0 or later (I have Android 7.0), so the app will not install. Apparently for political reasons, the app is not available in the Google Play store, so you must obtain the.apk file. Next, I attempted to update the OS beyond version 7.0. Uncertain if I meet all system requirements. บาคาร่าออนไลน์