There you go
root@tommy2 [/home/krydos]# dig +short A @ns1.heliohost.org keibee-it.com
65.19.141.77
root@tommy2 [/home/krydos]# dig +short A @ns2.heliohost.org keibee-it.com
65.19.141.77
People who were transferred early on, only their main domain would get moved to Plesk. That has been fixed now and all domains get moved to Plesk when your account is transferred.
Now that your .com is hosted on Plesk you should be able to install a Let's Encrypt certificate for it as long as it's not a wildcard certificate. Let us know if you have any problems with anything else.