If they are checking data brokers or aggregators it’s not really a background check. Carefully read any consent you give for a potential employer to perform a background check. Look for the records they are accessing and make a determination based on that language.
It is possible that some vendor is the space incorporates data brokers into their service, and that’s hard to tell. But they still should ask for your consent, I believe.
This sounds kind of like a data warehouse. Depending on the size of the data and number of connections I’d say script or database or module, this is a much bigger problem. Look into dbt (data build tool) and airflow