There is adifference in the X-country AND the navigation. NAvigation aid is pretty basic for LAPL.
Once you are through the LAPL exam, you can fly on your own and get really familiar with flying. Yes, 10hrs alone before you take pax - very sensible ! Should be compulsory anyway.
IF you feel you want to continue (for NFQ, I/R, etc), you can just do the 10hrs of additional navigation training - navigation and x-country and take the exam.
I went that route, would do again any time. My navigation training was focussing on the intercepts & orientation, nt keeping the da.... plane straight&level.
Took 35 +/- hours for the LAPL and would definitely have needed more than 10 hrs to get through PPL - nav training in one go at that time.
Also, not bad to have a re-training after a year or two as side effect of the LAPL->PPL move. In between I had done 35 hrs on my own / with friends.
just my 2 cts