Well, that’s a growing topic as many Dive Shops are dragging their feet in their free registration for Scuba Earth - which would make that kind of data readily available. Why they aren’t taking advantage of the wonderful opportunity is anyone’s guess. Regardless, it’s costing them business.
As a get around, you can send a message to local divers to a potential dive spot. They will know what’s around and maybe you’ll get a dive partner in the process. Best wishes.
Bill