On there you could purchase apps on your apple account & then go back to your iOS12 device app store. (3) Third option that I haven't tried but WILL is to download iTunes to your desktop computer. It looks like this to log in/out in the settings. Now on your iOS12 device, when you try to download Netflix in the app store it should say 'an older version is available' Then go log out of your iCloud & let them re-log in their device. Just go to app store & 'Purchase' netflix & any other iOS13 only apps.
Let it save their info onto the device just in case. Netflix Account Details The browser should automatically open new Netflix Tab with account settings. (2) If somebody with mutual trust will let you borrow their iOS13 device ( I did this), Have them log out of their apple/icloud account in the settings like above. Download it & then log out of their account & into yours again. If there is an available update for Netflix, it will appear here. Once your device has finished downloading the new software, open the App Store and search for Netflix. To do this, go to Settings > System > Software Updates and select Update Now. (1) According to krimxtixx, You can ask someone who has Netflix app on their icloud/apple account to log onto your iPhone/iPad with iOS12.5.1 with their apple ID on the iCloud login. To update Netflix on your Apple TV, you must have the latest version of tvOS. these are ways to get the most recent compatible version of the app. If you have NEVER downloaded Netflix before on your apple account, then look at the responses from 'adith225' on Decem(& December 15, 2020) and from 'krimxtix' on January 7, 202.
