, welcome to the Sabayon Linux forums
E17 has a limited amount of support at the moment in Sabayon, this is mainly due to the fact that the project is not very stable and doesn't seem to provide clear releases over time. Thus Gentoo (and Sabayon) provide only the base packages.
There should be an enlightenment overlay on Gentoo, if you're willing to use portage, but I'm not sure of which software is available there, as I've never used it.https://overlays.gentoo.org/dev/vapier/wiki/enlightenment
Currently I think the recommended E17 login manager in Sabayon is LXDM
, but you might replace with any other login manager that you like, for example SLIM
(provided that you update /etc/conf.d/xdm