I looked in my inventory and sMail and don't see anything there. Is there another place to look?

It depends on how they sent it.

If it was a sticker, it will go directly into your sticker collection.

If they just sent you an item, it should show up immediately in your inventory.

If they sent you a gift, you can pick it up at the gift center: https://subeta.net/explore/gifts.php/gifts

It should be either in your inventory or the Gift Center :) The notification when you get a gift will also have the link in it

Thank you so much. I've never gotten any notifications for gifts, but my "Events" had over a 1,000 in them of various things. Is that where you get the notifications?

Again, thank you, the link was just what did it. :D

yes, your notification would have been an Event.