Your sd is being thorough. That's great!
Occupational Therapist (OT) = occupational therapy. It is performed by an occupational therapist.
An occupational therapist evaluates for fine and gross motor skills. Some are also qualified to evaluate for Sensory Integration Disorder (SID) and perform Sensory Integration Therapy.
Fine and gross motor skill delays can be very subtle, yet cause huge problems when it comes to learning. These type delays can only be discovered by a qualified evaluator.
Short personal story. I knew difficult child had fine motor skill problems, Auditory Processing Disorders (APD), Sensory Integration Disorder (SID), and receptive/expressive language disorders before he was evaluated. I knew he was having trouble comprehending what he read -- didn't know it had a name. lol But you could have knocked me over with a feather when gross motor skills were included. I didn't see any of the "symptoms" that are so commonly listed on websites. After further research and watching him more closely, then I could see it.
I didn't realize the significance of the motor skill delays. It's the basis that all future learning is built upon. If I had it to do over again, Occupational Therapist (OT) would have been the priority.
difficult child's motor skill delays are formally identified as Apraxia (motor), aka Dyspraxia and Coordination Development Disorder. It's also impacted his perceptual skills.
You'll find some info that might be helpful at and in the Special Education Archives.
Ruling out potential problems is an excellent idea in my opinion. If needed, the sooner Occupational Therapist (OT) therapy is started, the better.
Hope this helps.