u/Important-Cable1048

Hello families. I have a 4-year-old boy who (evaluated but not diagnosed with autism) makes a typical "stimming." He runs back and forth between walls non-stop, holding his arms stiffly, moving his fingers, and making faces. If I distract him, he stops, but he loves doing it and can easily spend half an hour at a time engaged in it. He seems lost in thought, imagining something while deeply focused and absorbed.
Otherwise, his development is typical, although he finds it a bit difficult to play with other children.
Does anyone have a similar experience they could share? Did it stop over time?
Should I be worried?
Thanks.