nm-applet doesn't use appindicator

I've been trying enlightenment as DE in Debian Jessie. Unfortunately, they dropped the xembed support in E20, so only libappindicator-aware applications show up on the systray.

Theoretically, nm-applet supports appindicator since 0.8.3, but it doesn't show up in the systray. blueman for example does show in the systray

libappindicator1 and libappindicator3-1 are installed.

My initial hypotheses were:

1. e20 is SOMEHOW reporting it provides an xembed-capable systray and some applications use it by default, falling back on libappindicator when not available
2. nm-applet still does not work using libappindicator.
3. I messed up something different entirely

I tried to run nm-applet in Debian Stretch in e20 and Plasma 5, which is another DE that does no longer support xembed.

It still failed in both e20 and plasma 5, which rules out #1

Either I'm not doing something correctly or nm-applet (or at least the Debian version) does not support libappindicator?

I've currently ran out of ideas :(

Thanks for your help