Are all autistic people good at engineering

No. But many have good eye-hand, small-motor coordination, plus are very imaginative and intelligent. For some this translates to skills in engineering and computer science. For others, it means they are excellent writers -- technical writing, editing and publishing, being published authors. Many have an affinity with animals -- veterinary medicine, zoo keepers, animal trainers.

"ALL" people when you speak of ANY group is so overly broad it loses any meaning. You can't even legitimately make the statement all Degreed engineers are good at engineering. Because some people might be able to study and pass tests, yet be utterly incompetent when it comes to applying that knowledge.