Can't install Nginx Amplify Agent

[luison]

Trying to install Amplify Agent
https://amplify.nginx.com/docs/guide-installing-and-managing-nginx-amplify-agent.html#installing-the-agent

keep getting an error regarding :

# apt install nginx-amplify-agent
Reading package lists... Done
Building dependency tree
Reading state information... Done
Package nginx-amplify-agent is not available, but is referred to by another package.
This may mean that the package is missing, has been obsoleted, or
is only available from another source

E: Package 'nginx-amplify-agent' has no installation candidate

As I understand DEB10 is supported I am assuming this might be related to the fact of NGINX installed via autoinstall instead of package-manager.

Wondering how could I added it or how to included as an extra extension or package.
Thanks.

[mtx-z]

Did you run the first steps before? Including the apt-get update?
As the provided steps should add the required list to install the package.