Onchain stocks need to peg their price to the real stocks so issuers like Robinhood have to constantly mint new supply to lower the price or burn supply to raise it.
You can watch this happen at pretty regular intervals, but trading it is extremely crowded. Maybe during high vol days you could jump in and catch some arb but you'd be trying to arb-the-arber (robinhood) who both runs the chain and issues the tokens.