Question about gifting?

Hi.

The thing is that I've already bought a subclass (Cricle of Spores) and wanted to gift it to a friend.

But I can't find a way to do it, because when I go to "Additional purchase options" in Tasha's page (https://www.dndbeyond.com/marketplace/sourcebooks/tashas-cauldron-of-everything) Circle of Spores doesn't appear anymore and I can´t add it individually to my cart.

Is there any way to do it or any solution to this?

My friend really wants a Spore Druid to play with us :(

Thanks for your time.

You can purchase the Spores Druid individually from Guildmaster's Guide to Ravnica.