They do have one last driving lesson before a test all my kids did.

I didn't have to. Neither did my nephew (just done the P plate test). Good your kids did, I think it would pick up anything lacking.

Was it mandatory for your kids or did you just make sure they did?

The instructor advises the learner to have that one last lesson just before a test just to have all that needs to be done in a driving test still fresh in the kids memory.

I wish I had it back in my day as I can't remember what I did 5 minutes ago haha.

OK. That's a professional's tip. I remember being shown how to parallel park for the test. I had to do that first. If you failed that, you didn't get out on the road.

I remember I think that I had to do a hill start and if I rolled back to far or hit the gutter I didn't get to drive any further haha

When I was in high school in the U.S., we had a school-sponsored drivers' training........2 or 3 instructors.  Not that I participated, mind you............

Here it's offered by some schools, but it's like tennis lessons or something...extras. Mostly up to the parents.