It is just you if its not appearing.
I'm using Ad Nauseum which is just UBO but improved with added features and it appears just fine.
AdNauseam uses manifest version 2, too, so it will not be supported for long in Chrome / Chromium.
Not just them. Also FF mobile with UBO, and no email submission block for me.
AdNauseam uses manifest version 2, too, so it will not be supported for long in Chrome / Chromium.