theres not a whole lot, but from what i can remember;
ones similar to this (regency style with more traditional romance, like balls and stuff) with mostly romance focus:
-The Ladys Choice
-the widow's boutique (on itch.io or mobile app)
-RegencyLove (mobile app for iphone)
-arcadie second born (generally historical with romance but not as heavily focused, and not as slice of life)
in general i'd look through this list for ones that look interesting, they're all released and historical https://itch.io/games/released/tag-historical
and theres not a lot on this site for regency stuff but if you ever check out choice of games, hearts choice, and hosted games (mobile apps but also on steam and online in general. theyre all tied together by their companies but function slightly differently), they have a good handful of regency or historical in general stuff. most of it is less focused on romance, balls, and suitors though.