It's not the NPPL requirements that matter, it's EASA's - the LAPL(A) 'navex' is only 80nm, the EASA PPL one is 150nm. Since you will be applying for a PPL, you need to show that your training syllabus is/was equivalent to the EASA PPL syllabus.
You can add an FI rating to an LAPL, although you can't be paid & you can only instruct for the issue of an LAPL.