Found airtag, but can't get info about it

About identical to this question.

Find My sometimes immediately pops up a window trying to connect and add it to my devices (e.g. naming it and seeing a screen saying it was linked to my apple ID), but at the end of the procedure it says the tag is connected to another Apple ID.

If I tap "Identify found item" it spins for a long time and eventually comes back with "Could not find items. An unknown error occurred. Please try again in a few minutes. If the problem persists..." etc. I've reset it by taking the cover off and on 5 times but that made no difference.

I do not get the options posted in one of the replies "Items detected with you - Identify unknown airtag" or "Learn about this airtag". I'm using an iPad which I don't normally carry around with me.

Is there anything else I can do on my end to find more information? If not, should I just bring it to an Apple store so they can figure out the owner and return it?