Muluna, Moon of Nauvis has expectations for the player to use the Foundry and Big Mining Drill on Muluna, but the player is also expected to run through Muluna prior to visiting any other planet such as Vulcanus. This creates a minor conflict between Muluna, Moon of Nauvis and Roc's Hardcore Vulcanus.

suggested fix: Allow the Foundry at least to be unlocked at its normal point (if Muluna, Moon of Nauvis is installed), but lock away recipes critical for Vulcanus into the Vulcanus progression. I don't think there is any need to have the Big Mining Drill on Muluna as my Electric Mining Drills are working just fine.

Alternative fix: Detect installation of Muluna, Moon of Nauvis and migrate critical Muluna recipes to a different part of the tech tree, and if needed out of the Foundry and into some other structure. Assembly Machine, Chemical Plant, and Crusher can all be used on Muluna.

I don't actually know specifically what the Muluna tech tree is supposed to look like. I got to Muluna with Roc's Hardcore Vulcanus already installed. But in the screenshots provided on the Muluna, Moon of Nauvis mod page, I can see usage of the Foundry and Big Mining Drill. I don't know if these are important or critical for progression. If they are not, then just disregard everything else I said.