I can't get this thought out of my head, Will dubia roaches eat a tarantula molt? I don't plan on keeping my tarantula's molt for long and was wondering if I can feed it off to my dubia roaches and darkling beetles(cohab)
Sure! They'd eat their own molts, a tarantula molt shouldn't be any different.
You may want to avoid the part with the irritating hairs, though. More for your own finger-safety in not getting those into your roach bin than for them.