as the title suggests, science recipes added by maraxis and muluna do not get enhanced variants. For muluna, this is the muluna locked recipe for space science (vanilla one still gets enhanced) and the exploration science pack. Maraxis has the Hydraulic science pack, plus additional recipes for the basic (pre-space) sciences.

I believe this might be a load order issue, but I am not sure.

Is it still an issue?

it seems to work now. the only pack I don't see in the enhancer is the exploration science pack (from muluna), but I think its weird astronomical data "fluid" may be messing with things. maraxis is playing nice now, and the other muluna science recipie works.