How to use Grim Hollow Transformations?

Hello, i recently just got access to the latest Grim Hollow book from the partnered content and i noticed that it has the transformation features in it. I was excited about this because i have a couple of players in a game i'm running that have transformations from this book. However, when i started looking around on character sheets and in the book content on DnDBeyond itself i couldn't find a way to actually add it to their sheets. Is there a way for me to actually add the transformation features to their character sheets? Before this i was just turning each transformation level into a feat so i was wondering if there was a new way to add them or not.

The Transformations are something D&D Beyond wasn’t able to implement so I’m afraid using homebrew Feats is still your best option 

I feel like there should be a feature request for these, if there isn't already? I am making the feats version for one of my players now, and even if that works well and we can't have dedicated Transformation integration, I feel like additions to the Feats Homebrew settings would make it easier to incorporate the different features from the various boons as different options within the feats. Just hoping that someone sees this and it goes up the chain eventually, the feats do work "enough".