Since this is a HMOFA game of sorts, I am compelled to play it. I also like blackjack.
Modding support by default is a big W feature, so great job including that in your first ever release!
I'll start with what I think are mandatory things you should work on in future updates/titles.
A button UI like this would be okay in a text-based game with 100+ words to read in-between clicks, but you need something with more punch in a visual-focused experience.
Next, cards: A card game without cards is a terrible thing of sadness, reserved for only a depressing scene where the protagonists are reduced to playing with nothing but scraps of papers with the names of the cards scribbled on. I don't know if the model/LoRAs exist for it, but characters playing with suits that match them would be an amazing edition. If not, just some bog-standard card images you can find online work too. If the game was more in-depth I would also suggest figuring out how to simulate decks and extended decks, but that's not very important, just more of a flex feature than anything.
The dealers could use some more information on their selection, like what number they must stop at, or if they're a girl, femboy, futa, ect. I got the feeling the number was same between dealers? That might be something to look at (could add some personality to the characters.)
I liked that the images seemed to follow some sort of linear progression/escalation, but IMO them being broken up into "acts" would be interesting. With new dialogue and challenge added between them.
IMO 5 US dollars for 102 extra AI-genned images is pretty steep, and there's a decent amount of artifacting and inconsistantcy in the gens I saw. Personally, I'd need much more meat to the gameplay/writing if I were to consider paying that. Sophia is a cute AI OC, but she has 3 lines of dialogue to derieve a personality from!
But, again, pricing is entirely your choice, and of course you'll likely be adding more content as time goes on.
Anyway, that's my two cents.