I’d look at two things before you start pulling pavers back up.
First, grab a long level or even a straight 2x4 and actually measure the pitch. For pool decks, you usually want around 1/8 to 1/4 inch per foot of slope away from the pool. Eyeballing it can be deceiving, especially with new pavers that have texture and joint sand that holds a little surface water.
Second, watch what happens during a real rain, not just a rinse. Like Megan said, hose water behaves differently. A steady downpour will show you if water is actually migrating toward the drainage strip or just sitting in the low joints temporarily. If it dries in 30 to 40 minutes and isn’t flowing toward the shell, that’s generally acceptable.
One other thing people forget is splash out plus bather load. If that low side is near steps or where people get in and out, it’ll see more water and may settle slightly over the first few weeks. Keep an eye on it and recheck your base if the puddle gets bigger over time.
Minor pooling that evaporates quickly isn’t a structural failure. The real red flags are water sitting for hours, algae starting to form, or moisture constantly against the coping or beam. If you’re not seeing that, you’re probably within normal DIY tolerance.