Private Registry with Auto Devops

Hi we are using a self hosted instance of Gitlab and I have been starting to look at Auto Devops.

Without going into unnecessary detail we cannot use the built in Gitlab registry due to business decisions out of my control.

According to the docs for Auto Devops the use of private registries is not recommended or documented.

My question is is it possible? Can I use ECR instead but still utilise all the features of auto devops?

I’ve only used GitLab SASS, but these docs seem to imply that what you want is possible.