Hi @Lars Rinde , sincerest apologies for the delayed response. To suppress your recommendation rules, have a look at https://learn.microsoft.com/en-us/azure/security-center/tutorial-security-policy#disable-security-policies and let me know if this is helpful or not.
Having said that, while it's definitely not required, the recommended rule can in-fact be applied to your public facing services by placing a WAF on either Azure Front Door or App Gateway so traffic is forced through the WAF.