Explain your idea

Simple idea of an item magnet upgrade (that uses energy) for the capacitor backpack to increase utility, with the look on the backpack being either a large horseshoe shaped magnet or a more realistic electromagnet. (whichever looks better and/or is more feasible)

Sorry in advance, for any Github faux pas, as I don't use the site very often

I thought that issue was fixed ages ago, but if not, then it would help IE set a standard for other magnet mods to not pick stuff up from conveyor belts, as well as test issues from its own method of resisting magnets

IE has set that standard.
Back in the day, Vazkii (Botania), WayOfTime (Blood Magic), myself and some other devs agreed on how to tag an item as "invalid for magnet pickup".
We've been going strong with that, it's not our fault when a bunch of other mods don't put that effort in >_>

I feel like this would require first fixing magnets picking up things from belts.

so I was right in thinking it got fixed, but other modders broke it
good to know

@RosaryMala do you know which magnets are having problems with IE conveyors?

Would be nice if I could contact the respective mod devs and ask them to respect the PreventRemoteMovement NBT tag

Yeah, it's https://www.curseforge.com/minecraft/mc-mods/sophisticated-backpacks

Cool, I've already opened an issue with them =)