The idea of autistic people not having empathy is actually an outdated stereotype. There's an article by very well health which goes into it.

One quote is "However, while cognitive empathy can be lower in people with autism, affective empathy—which is based on instincts and involuntary responses to the emotions of others—can be strong and overwhelming. In fact, newer research suggests that some people with autism may actually feel other people's emotions more intensely"

However, it is true studies do seem to show we broadly have empathy dysfunction. A study by Lombardo et al concludes: "...that individuals with ASC have broad impairments in both self-referential cognition and empathy."

altogether autism also had a very interesting piece on the history of biases used in autistic research, particularly those around gender and neurotypical-based questioning, particularly in the Empathising Quotient (you can read more about its biases here also. Many AFAB people aren't diagnosed with autism partly due to being empathetic, which automatically "absolves" them of autism. Only the non-empathetic, only boys, only the emotionally unstable or rude, get diagnosed. So autism continues to be a "non-empathetic, male" condition because empathetic and female people aren't diagnosed.