HCL is doing a great job by transferring a lot of informations from IBM to their platforms. By now HCL offers the following links:

HCL Notes and Domino Wiki

HCL Connections On-Premises Documentation

HCL Connections Cloud Documentation

HCL Notes/Domino Fixlist

And Tim Clark promised that there are a few more on the way…

On overview about the already migrated forums and wikis can be found here:

https://help.hcltechsw.com/docs/nsf/index.html