You will not find something that looks like this. I have modeled several infinity edge pools and it is easiest to just model it for what you want. If the size and shape doesn't matter too much you might find something on 3D Warehouse.
I have attached a screenshot of a SS Infinity Pool I have done on a Private Penthouse roof deck.
Gerald "The simplification of anything is always sensational" GKC AC 25-4013 USA, CadImage Tools 2019 MacBook Pro 16" w/ AMD Radeon Pro 5600M GPU OS X 11.6 2.4 Ghz 8 core i9, 64 GB RAM 27" LG 5K Monitor
I recently modeled a waterfall edge pool in Archicad with the wall tool for the pool, a slab for the water, and a thin wall for the "waterfall". (A profiled wall could also be utilized to include the coping, waterline tile, etc.) It all rendered nicely in Twinmotion.
ArchiCAD since 8.0, currently on 22, waiting on 26, maybe...
I prefer to model pool water with a mesh as then you do not need to worry about intersections or double lines in section and it is easier to select. It also allows you to set a colour fill to be able to quickly identify water bodies in sections.
AC22-23 AUS 7000 Self-taught, bend it till it breaks. Win10 | E5620 x 2 | 24GB | K2200 RIP PSU Win10 | R5 2600 | 16GB | GTX1660