If that theory is correct, an undersea mining expedition in the area south of the Gulf could yield gold and bdellium, and onyx stone. I do not think that we have quite the technology for that sort of mining, however.
Even if we did, the plate tectonics would need to be calculated, and we don’t know how far Pishon flowed. The scientists could be searching for a long time.
Your other hope would be tree fossils. Pretty sure God took the flaming Sword of God back to heaven with Him. The scientists could do tests on the seabed, but it’s been seabed for thousands of years. I doubt they’ll come up with anything.