I would do the surface last after the pavers because you will fill the pool after the surface is done and when they come out for the pavers stuff might get dusty and things are dropping into the pool. Also make sure to pressure test the plumbing before the pavers and the surface. I had my pool build last year and they did the test just before the surface was done everything was looking good but now we lose pressure in the return pips. It looks like we have to jackhammer parts of the deck open to fix the leak. I don’t want to scare you just pay attention to the plumbing before you put the pavers over it.
Good luck the summer is coming

Guido