Typically no.
No other job do you get paid extra money by customers simply for doing your job.
Also, I’d feel terrible if my tipping contributed to an American-esque system where tipping is used to justify near slave working conditions and payment.
If you’re exceptional at the job then you might just get the 20-30p change but as a general rule no. I worked for a few years as a waitress and I kinda felt insulted when people tipped me. Like they feel sorry for me or that I need help