Unfortunately Part FCL requires that the training to convert LAPL(A) -> PPL(A) be done
after being issued an LAPL. FCL.210.A (b):
Specific requirements for applicants holding an LAPL(A). Applicants for a PPL(A) holding an LAPL(A) shall have
completed at least 15 hours of flight time on aeroplanes after the issue of the LAPL(A), of which at least 10 shall be
flight instruction completed in a training course at an ATO. This training course shall include at least 4 hours of
supervised solo flight time, including at least 2 hours of solo cross-country flight time with at least 1 cross-country
flight of at least 270 km (150 NM), during which full stop landings at 2 aerodromes different from the aerodrome of
departure shall be made.
You can go directly from NPPL to PPL without holding an LAPL but only if you meet the requirements quoted above & FCL.235 (the PPL(A) skill test.)