Is it possible to automate changing some security settings in Catalina?
Yes. Set up a MDM and you can easily make configuration profiles so your peers or people you support don’t have to manage their Macs as much.

https://support.apple.com/guide/mdm/welcome/web
https://www.apple.com/macos/server/
https://www.fleetsmith.com/ or https://www.jamf.com/products/jamf-now/