So uh... I didn't think that my work cataloging the Galar Dex in the prior thread would be so relevant but... might as well repost it. Serebii also has a list (and shout-outs to Joe for helping inform several of my inclusions) but I've got several on here that haven't been added to the site yet, plus citations for those Pokemon whose inclusion may be in doubt.
They are listed below, ordered by National Dex number of the earliest-introduced member of the lineage. Those listed outside of parentheses have been shown in official in-game trailers/screenshots, and those in parentheses are assumed to be present based on the presentation of another member of their evolutionary line.
We're at about 177 right now. I sincerely hope your favorite has made the cut.