Is there a documentation on how to deploy tljh jupyterhub 3 on AWS?
I assume you mean deploy JupyterLab 3 on TLJH? (According to here the current release of JupyterHub is version 1.3.)
To clarify: I just did it, and it looks like it’s working! However the PR needs an update.
I gather the following describes the updating & extra steps you refer to?