It appears that you are not using custom name servers for your domain registrar (I believe you are using GoDaddy).
You have two options to resolve this:
Option 1:
Update your domain registrar’s name servers to the following:
ns1.incontri-escort.it
ns2.incontri-escort.it
Once you make this change, the DNS records in Plesk will take effect. However, please note that since you only have one IP address, some DNS checkers may raise warnings regarding the name servers, as they expect multiple IPs for redundancy.
Option 2:
Manually add all the DNS records (except for the NS records) from Plesk into your domain registrar’s DNS settings.