I've been using Gmail on my iphone 12 for about a year now because I hadn't been reliably getting Mail notifications using the Apple Mail app. The Gmail app would always notify me even when the Apple Mail app did not.
Now that I have updated to IOS16, I find that for the first time in years, I am reliably getting Apple Mail notifications. I have turned off Gmail notifications and will delete that app altogether in another couple of days once I am satisfied that Mail is still reliably working the way it is now.
I've always preferred the Apple Mail app over Gmail as it shows my different email accounts in a better, more organized way, and everything seems to be formatted better when viewing emails using Apple Mail on an iphone as well. The only thing I DON'T like about the Apple Mail app is that when using Gmail accounts, there is no push, only fetch (as mentioned above). But they can be set to fetch every 15 minutes, so I don't consider it a major issue.
This is the first IOS version that I have used in years that so far, I have had absolutely no issues with. It's about time.
Thank you Apple.