Just to confirm - you are launching Nuke and Hiero through the AYON Launcher, yes?
If you just run Nuke or Hiero regularly (not from AYON) no integration will be active and thus nothing of AYON will be active, loaded and thus show no menu.
Also see the explanation here (which refers to OpenPype, but the same goes for AYON). Since you were able to get Resolve working I’m pretty sure you did this correctly - but it’s good to check.
If so, @jakub.jezek has more experience with the Foundry tools so he might be better to help identify any sources of issue why the integration may do nothing at all.