I will try to make some progress regarding this in OTP soon and at least take a decision about what to do about this for the OTP 22 release.
Finally there is 22.0-rc1 version of Erlang in asdf-erlang plugin, but I did not tried it yet. As you can see issue have still open status and it’s also not yet resolved, so it’s most probably not yet added to it.
For more information you would need to ask somebody from Erlang Core Team as I did not yet found anything other. Maybe somebody is already working on this … Author of previously mentioned comment is assigned to this ticket, so there is a chance to see stable support for it really soon.
I was trying this last night and had the same issue. With asdf in the erlang readme it lists out all of the package dependencies that need to be installed on Ubuntu but even when I installed them I was getting not found messages about the docs and wx.
Which packages are this? Please be aware that the installer might tell you to install libwx but you actually need libwx-devel or something. Most Linux distributions do this separation of libraries and their header files.