Right, with 14 ticks/comments in the past 5 days, you can see there is the usual water just after the pendulum, and a bit on the first pitch chimney as well. But it does not seem to be stopping people, so you should be fine.
Sure, you could look at the water with binoculars from the valley floor if you want. But I think the tick comments would be more informative.
https://www.mountainproject.com/route/stats/105862881/royal-arches-510-or-57-a0
There are 2 main lines of water visible above in Steph Abegg's photo overlay.
The big one on the left (much white water showing) is the "Royal Arches Cascade". It is entirely left of the climbing. It lands at the "Devil's Bathtubs", right of Serenity Crack.
The smaller one right of center is visible as a wide black streak, right of the yellow overlay line about 3/4 of the way to the top. It crosses the climbing just after the pendulum at the (P9) belay, and it is where you take off your shoes briefly. There is a heavier left sub branch of it (some white water showing) which crosses the climbing just right of the (P10) belay. Lower down, this stream is in the corner just left of P4. The one where you go out right and climb the short hand crack.