Note – This is from a personal perspective
Autism can mean living in a world in which you perceive language, social, emotions and sensory in a vastly different way to other people. Yes people on the spectrum have emotions and have empathy but the way in which people process it, navigate it and show it are very different so the outside view can be confuse people.
Many people on the autism spectrum have a condition called Alexithymia which means finding “words” and processing emotions can be hard to reach in typical time, it can take me a day to understand how I felt about tomorrow and in some cases years to process complex emotions from a point in time, but it doesn’t mean I’m lacking or devoid of emotion nor empathy. People on spectrum show empathy in different ways.
Paul Isaacs Adult with Autism 2014