Is wholemeal or medium chapati flour same or similar to plain white flour and can it be used to make pastries?

Can the chapati flour be used to make pastries? So in the below ingredients, replacing the plain white flour with chapati, would that still make pastries?

Ingredients
For the filling

2 Onion(s) (small, Thinly sliced)
1 tbsp Vegetable oil
200g Cheddar cheese (grated)
200g Potato(es) (peeled and finely diced)

For the pastry

300g Plain white flour
75g Butter (unsalted) (cold)
75g Lard (cold)
1 Salt
1 Egg(s) (free range) (beaten)