The generator block seems to only accept solid fuels (coal etc), it would be nice to be able to attach electricity from another mod making use of standard Forge Energy to the generator to keep the mod's electricals powered, thanks!

i'd additionally like to request fabric techreborn support when FE is added, currently the mod linked above does not have a fabric version

I one hundred percent agree!

I'd like to second this, It would be really awesome if we could connect the appliances from this mod to a Forge Energy network either using the generator or another "adapter" block if possible

Yes please!

For those interested, a member of the community has created an addon that adds a new block so you can use FE.
https://www.curseforge.com/minecraft/mc-mods/cfm-refurbished-circuit-breaker

I will still be looking into official support at some point, but I approve of this addon.