I'm currently sitting on a chair at my computer bouncing my legs and feet. On some occasions I move from side to side slightly. In between typing I chew around my nails, and while I am typing I bite the insides of my mouth.
That's pretty normal for me, but I don't know what's 'normal' for the rest of the population. I'd imagine that it would be quite common, even for NTs, because being at a computer is not a very physical activity, so you're likely to get restless. Your body has to let go of some energy in one way or another!
If it is more of a stimming thing, then yeah, nothing wrong with that.
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Your neurodiverse (Aspie) score: 129 of 200
Your neurotypical (non-autistic) score: 100 of 200
You seem to have both neurodiverse and neurotypical traits
AQ: 39 / 50