plastic beads can be challenging to remove and that is speaking from a seasoned medical provider who has removed hundreds of them over the years. mostly from children who are not autistic. i have special instruments and can use directed light and magnification. i suspect that do not have these tools or the skills. unless you can gently irrigate out his ear with a stream of warm water (from a hand-held shower while both of you are in the bathtub or shower) then it would be wise not to attempt it. using any type of instrumentation may hurt him if it scratches the sensitive ear canal or may rupture his eardrum. as much as i know you hate to do this you will either need to take him to see his medical provider see an ent or go to the er. he can be restrained a bit or even slightly sedated but that bead needs to get out of there.
have a 7yo authistic who often put stuffs in his ears. mostly torn paper pcs. he moves and we cant take it out. we have a 7 year old autistic who often put stuffs in his ears. mostly torn paper pieces. its very difficult to remove it with pullers carefully because he moves his head around knowing we are doing stuffs in his ears and like as if he doesn't want it removed. this time however its impossible for us to remove it its a plastic bead slightly squeezed in a choke point in the ear canal. his autism is mild to severe that he still doesn't talk or understand anything and we don't know what to do.