Autofill was an Oreo feature, so it checks out, Apple added it as well in the next release.
(Autofill as a feature has been there for way longer on Android but it was relying on accessibility, which was a bit hacky and pretty unsecure)
I replaced the Android before it for the exact same reason. Motorola developed a good reputation, which was promptly torpedoed once it got bought.
I am pretty that most of the Android phones will be sold in the future ;)
Even without being cheeky, I believe that most of autofill is supported through play services on older phones
I have plenty of issues with Motorola (and the Android OS update situation) but you bought a budget $250 phone. Not particularly surprising that the customer care and updates etc. weren't on par with a phone that retailed for 3 times that.