Well, if you haven’t checked out her “Dust in the Wind” collaboration with Algal the Bard (on his channel) that’s linked at the end of “House of the Rising Sun”, definitely do that. I wouldn’t consider myself an expert, but the “Bardcore” channel has quite a few playlists of period songs done in an instrumental ‘bardcore’ style, which seems like the popular approach. I have yet to run across anybody who does the ‘full monty’ (by which I mean, including vocals) as well as Hildegard does.