Search NCSL by a broad topic then filter results. Click on Database under the heading "Resources Include"
One way to figure out what policymakers are doing in an area is to find their professional associations. Think about what level or branch of government and then search for a national association devoted to that group. Once you find the association see if you can find a resource or issues page
Another way to find association information is to use domain searching. In google, search for your keyword and then include site:[domain url]. The example below is searching for covid-19 information from the National Association of County and City Health Officials (NACCHO)
Here are other examples of associations
Search for information from a government or organization by using Google domain search. Enter your keywords and then add site:[url of website]
This can be useful also when looking for information from the military (.mil) or a state (Michigan is .michigan.gov) or a city (Detroit is .detroit.mi.gov)