A simple tool or anything to check, whether my website is secure in terms of dsgvo and cookieless tracking

I have On Premise Matomo on my website and did all the points, that Matomo recommends. Now I want to find out, if my website is really ok in terms of dsgvo and not using a cooking banner… Can somebody help me or recommend a simple tool, which can find out, if everything is alright?
Thanks a lot.