In my anticipation, I've been spiralling about the future seasons of Bridgerton. If we get past Eloise and her season, we get Leg of Mutton sleeves on everyone. In the modern zeitgeist, it's the princess sleeve scene on Ariel and Giselle, but it's so pretty, and it's basically flared out regency silhouette.
And actual dress from the period first then some interpretations of what the show could give.