I just found this in Reddit. Not an add on, but it seems to work with a macro (that you have to set up once):

www.reddit.com/r/wow/s/OpPn...

If you still need/want someone to get some gifts from, my code is 515621657755 :)

Just wanted to check if it even can drop on alts. „Seize your chance to get this lovely mount from the first fight daily with Apothecary Hummel.“ from the blue post sounded like first time on the account only.

Do I read it right that this can only drop from the first box of the day?

‪Already found you yesterday when I was looking who might be here who puts a smile on my face in the other timeline. Was hoping it was you :D‬