I am following the steps mentioned on this link @ https://docs.microsoft.com/en-us/sharepoint/dev/solution-guidance/security-apponly-azuread to register a new application inside Azure AD. but when i click to register a new application, i got this message:-

so does this mean that Azure AD App-Only is now deprecated ? if the answer is yes then what is the most up to date approach?
now what i am trying to do is to register an application inside Azure AD and create a certificate then use the clientId,TenantId, certificate to be able to authenticate my SharePoint CSOM code against SharePoint online using this code PnP.Framework.AuthenticationManager(clientId, certificatePath, certificatePassword, tenantId);