I highly recommend the Zachtronics Solitaire Collection. Greatly designed solitaire games. I play them every day on my commute to work.
https://hempuli.itch.io/a-solitaire-mystery
Funny enough it has a "Royal Flush Solitaire" where you make poker hands and your goal is to reach 240 points.
Binary Solitaire and Transformation are my favorites.
For now, my web prototype lets you choose the numbers of suits, colors, ranks, columns, and multiples of cards drawn from the deck. It's a start. I invite HN to explore the Klondike Extended Universe:
My partner used to relax with Flipflop Solitaire[1], which lets you choose how many suits there are in the deck. These days they play lots of Balatro with the checkered deck[2].