[Neoon]

Ow shit. I thought public key in panel works since I changed it one time and it works. I don't see any VNC option nor have access to my old laptop (already destroyed), any idea how I can get it without being need to terminate and build a new one? No rush, all is working automatically inside, just want to add some things.

The Panel follows a different path than Virtualizor or SolusVM, means, it won't touch any files or whatsoever after you created the container.
Including network, publickey....

If you update the public key and create a new container it will be created with this public key right, you can always update it via ssh.
In your case there is currently no other option than reinstall.

There will be options in the future, to sync the public key with one click, same as restore the network configuration including getting a serial session.