One thing I can suggest that may or may not help-
in My MLS or on public records, I can overhead map search ...like a drone... literally click on each plat # along a view path to see if any sold,
On my MLS (many functions are the same ), I can search by location, creating a blue rectangle in an area such as right along a shoreline. This can bring up sales that other searches fail to find - it is a very targeted search for physical location. I might not add sf or other parameters to bring up as many sales as possible