I’m not sure about Navigraph Charts. But, I download my SimBrief flight plan as FS2020 .PLN file. Then I load this same .PLN file to the world map before I start the flight. The ATC doesn’t follow the SID altitude constraints, but I find that it follows STAR altitude constraints often. I can’t say that it works 100% of the time. The default ATC is incosistent, but most of the time for me, the ATC follows the constraints.
Or maybe it only works where the altitude constraints are a max one, but not min. Or maybe it only works on absolute altitude constraints instead. I dunno. Might need more investigation.
But then again, maybe it doesn’t work for ENVA, I dunno… Like I said, it’s inconsistent. I can’t say that it’s 100% working, but it’s definitely not 100% not working.