Experts to consult about yard drainage?

We just bought our house in July, and over this past winter (during that week of torrential downpour), the rear corner of our backyard became a lake. There’s actually already a functioning sump pump installed in that area to deal with water buildup because that area is noticeably the lowest point of the yard. The previous owner disclosed to us that water did sometimes pool in that area during heavy rain but he said that the sump pump had never failed to clear the water just fine (and we don’t think he’s lying—for perspective, our next-door neighbors have lived in their house for 40 years and this past winter was the first time they’ve ever dealt with flooding in the area of their backyard adjacent to ours). So, long story short, we have ambitions of eventually redoing our lackluster backyard to make a beautiful kid-friendly entertaining space/oasis, and want to make sure the literal foundations of our yard are good before we get to any surface design. In terms of the area with the sump pump and flooding, it SEEMS that the rainwater lake was due to a truly unusual amount of rain and that the sump pump has otherwise been proficient…. but I also feel wary of charging forward with laying in a patio where there’s a known potential problem. I’ve seen recs here on BPN for French drain specialists, but does anyone have advice or recs for someone to consult to find out if we have a drainage problem at all? It just seems to me that if I call a French drain specialist for a consult, they’ll… recommend i put in a French drain?, even if that’s not necessarily the best solution? TIA!