I'm actually kind of unsure whether this is a bug or just something that wasn't implemented because it isn't used in vanilla but I'm fairly sure it's a bug, or at the very least an oversight
The player remote view can't put "item ghosts" in fuel slots that are in equipment grid item sub-inventories, making it impossible to actually fuel these items remotely with logistics bots unlike everything else in the game
(Pictured: the Schall Tank Platoon's Vehicle nuclear reactor, that has a right-click that opens the menu shown above)
[2.0.28 MOD] Logistics bots cannot deliver items into fuel slots of equipment grid items
Re: [2.0.28 MOD] Logistics bots cannot deliver items into fuel slots of equipment grid items
Thanks for the report. I don't believe we will be changing this. You simply have to do it manually in this case.
If you want to get ahold of me I'm almost always on Discord.