That's insane man. Can you somehow just not have live stock feeds active at all so the bots don't get triggered?like cloudflare and Captcha? Yeah we tried those, the current wave of bots act like end users, there's almost no way to weed them out.
They sit idle until a part that they are watching shows in stock then they add it to the basket and checkout as usual. Expect, because there are potentially hundreds of bots watching the live stock level feed and can process multiple orders to multiple addresses before end users even notice it's in stock, they can clear us out in minutes.