I think the plants have already been in the market but just under one name while they have slight differences. It's just that now scientists are differentiating them and giving them new names. Look at this one on Amazon. They look a lot like P. Kaweesakii.
https://www.amazon.com/Succulent-Seeds-PHYLLANTHUS-Mirabilis-Caudiciform/dp/B08NSXWRJS