How do I connect Cloud GitHub with my on premises Azure DevOps Server?

I am trying to create a build pipeline on my onpremises instance of Azure DevOps 2020 Server.

Unlike the cloud version of Azure Devops, I see no option to pull from the GitHub repository.

I tried to setup as “other”, but authentication fails.

I tried to setup “Github Connections” at the project level, but that clearly refers to Github enterprise server which is not what we use.

We use GitHub online and not on-premises.