The achievement doesn't show up

Do you mean the achievement doesn't unlock or the achievement notification doesn't show up?

I think he means the achievement doesn't register at all, it happens to me too, i tried getting the plethora of cats achievement and only needed to tame 2 cats, so I tamed 2 cats, the game didn't respond, i checked my internet and microsoft account, both were good and working. I decided to tame 3 more cats, Nothing... I checked my achievements log and realized the green xp bar thing wasn't moving/leveling at all, it was just, stuck.

@OcelotOnesie It’s been a long time since I got notifications when I make an achievement in Minecraft, and besides, I also don’t get notifications when someone sends me an invitation. This is also true of all my friends and I don't remember which version this bug started to happen.

Android 9.0

Minecraft v1.16.40

I don't receive notifications of achievements and invitations in the latest official version (1.16.40), and I'm an android user.

It happened to me too. When I try to make it to sign achievement nothing pop-up  and when I try to do renewable energy nothing happened as well as Castaway achievement. When I play the game to do the hundred day achievement it is stuck at the same number it was at before

Cleaning up old tickets: This ticket has not received a response from the reporter (~3 months+) so is being closed as Incomplete. If you feel this is still a valid issue then please comment, or create a new ticket following the Issue Guidelines which includes steps to reproduce the problem.

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This is true iam on 1.16.221 i dont get notification but i get the achievement after a minute