For a systematic review/meta analysis you’d be expected to document your search strategy, exclusion criteria, etc anyway wouldn’t you? That’d preclude using a tool like this other than as a sense check to see if you needed to add more keywords/expand your search criteria anyway.

My wife does that for her day job (in the U.K. national healthcare system) and the systematic reviews have to be super well documented and even pre-registered on a system called PROSPERO. The published papers always have the full search strategy at the end.