Currently, the average is 1.4%, down from 1.5%. That is system-wide, but of course it doesn't speak to the individual card in the individual setting. Some of those cards, including the newly introduced Mastercard MUSE, can range up closer to 2.5%, but on a system-wide basis it is 1.5% off the top.
On May 20th, 2021. See this statement in context.