We do: Riding for the Disabled, Motor Skills United, some calisthenics, jujitsu, extra PE with another year group. All that Liz said above. Take them swimming but don't stress about lessons, just keep having fun in the water (ours is now 10 and ready for lessons but it has taken years). Attentional difficulty may be present and watch for difficulty in maths and English due to co-occurring possibilities like dyslexia.
The key is to have fun and target any key areas OT points out like shoulders, pelvis, midline crossing and core.
Gross motor is the foundation for fine motor. Obstacle courses at home, plenty of park time, even soft play if they still want to.
Fine motor again take cue from your child - do they like pottery, paints, building with lego? Dough disco (youtube) great for warm up of hands. Lots of playing with pre handwriting patterns - bath crayons, steamy window, blackboard - zigzags, castle tops and circles. Remind them its only practice and its fine if wobbly! Or just 'draw' with a finger on textures like carpet, wall, lino etc.
Movement Matters website worth a look, and Sensory Direct for ideas for kit for home/school. We have a weighted blanket coming today and DS has weighted lap pad at school to help with proprioception - it 'grounds' him so he feels less at sea. Mix of type/handwriting good idea in long term.
Oh - movement breaks too - ask for school to do these esp when curriculum becomes more sedentary in Y1. After 30 mins or so of reading/writing the child does a few mins of deep pressure exercise. So squeeze palms together like strenuous prayer, hug them self, push the top of their head down - gentle but firm enough to give the body input. Great for helping with attention drifting dues to body saying - help, where am I in space! (proprioception again).
School have a nominal 6k to spend on each child with additional needs - so you can ask for small group motor skills sessions and kit like wedge cushion (they could etc one to try and see if DC benefits) and they should differentiate and make reasonable adjustments. DS liked working on handwriting using ipad at school - writing wizard and dexteria.
After that ask about other interventions - SENCo/head/teacher should help. Often they can apply for top up funding from the local authority after a year or two.
Make sure emotional needs are taken into account, its tough being a kid with dyspraxia - tiring and frustrating when other kids crack writing and you still struggle (Y1/2) so long term think nurture group etc
Watch speech and language as sometimes dyspraxia has an effect on articulators and how clear speech is. Talking and listening and memory games are good to have in mind.
Then there's EHCP's but don't go there until all else tried as its an exhausting process!