Reply from Gordan in our closed Facebook group;
From what little you have said it sounds like you need to change his routine my first advice is start to reduce then stop his morning nap
I don’t know what your bedtime routine is but ours for all four of ours was teatime bath then bed the timing has changed now that they are older but essentially is the same when you start your bedtime routine try to make it as calm and peaceful as you can try to avoid stimulating activities
It may take a little while to implement but it should help
Good luck ❤️