It would be something incredible if you could add support for the energy systems and fluid tanks to the forge generator 1.12.2 (in your spare time, of course, as I know it is an "outdated" version, despite the massive majority of mods , be present only in it) if these two systems were implemented, it would be something very cool!
1.12.2 is no longer maintained. If you wish for this feature, code it and open a pull request on https://github.com/Pylo/MCreatorGenerator-Forge-1.12.2 and I will merge it in the codebase.