Pointing multiple domains to Lightsail Instance

I have created an instance in Lightsail and configured Cyberpanel as a Panel. I have assigned IP and configured Domain in the instance. Only the site that I create in Cyberpanel and whose DNS are in the zones of the instances works. For this case, only domain.com and sub.domain.com worked. Both added in the instance zones. Now, I want to point doman2.com to my VPS, but it doesn't work and I can't add a zone with another domain to my instance. what should I do? Thank you.