Fyi fancy water retaining potting soils use hydrogels. You can find kitty litter that is made out of it & also find it in diapersHere's a link and video in link
Just remove brackets off link
(https)://www.yourindoorherbs.com/use-water-beads-for-plants/
Had this typed already I have used the kitty litter & potting soil for my petunia flowers before