I'm playing a Krastorio 2 + Space exploration playthough, and while this mod really helped with speeding through alot of early game, I ran into an issue when attempting to insert large buildings like burner and electric drills into the network. No matter what, I can't put certain buildings into the network, they just sit in the chest.

Toggle "debug info in tooltip" and look for item info ids.

Then put this ids, or whole subgroups / categories ids in appropriate fields in settings.

By default there are only raw / intermediates / ammo / consumables should go to storage.

Hmm, I tried doing that just now, updating the 7th data:extend table to this.
data:extend({
{
type = "string-setting",
name = "QuantumResourceDistribution_allowed",
setting_type = "runtime-per-user",
default_value = 'intermediate-products,resources,science,storage,production,logistics,combat',
allow_blank = true,
auto_trim = true,
order = "5"
}
})
Yet I still run into the issue.

You need to enter this in game in runtime-per-user mod settings tab.
In file there are DEFAULT values, so it has no effect if changed with mod installed.

Is there a default value for all items, like ALL?

No, but you can try to hijack function "can_be_put_in_storage" in control.lua.

function can_be_put_in_storage(prototype)
if not prototype then return false end
return true
end

Oh that works now, thank you so much!