>Is it possible to get notifications on a locked home screen when receiving emails? I’ve tried everything I could find online.

It should work as long as you have Lock Screen enabled in the mail notification settings. iOS 16 really messed up notifications for me though, and my mail notifications rarely show on the lock screen anymore. It's a real nuisance.

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>Talked to one Apple advisor who told me to update and then it should work. It didn’t.

It should work, but it doesn't always work because of the changes Apple made in iOS 16. They broke notifications.

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>Talked to another one today who said that the Mail app is not supposed to have notifications like other apps?

That person is incompetent and needs to be fired.