It has been recognised that the LAPL-to-PPL course has been poorly defined by the €urocrats....
The topic was raised at the last EASA FCL Implementation Forum and delegates agreed that clarification was required.
Hence it is likely that the forthcoming FCL.002 NPA will state that the course 'shall include training for any part of the PPL syllabus which was not previously included in the applicant's LAPL course' or words to that effect.
There should then be no ambiguity regarding the 150nm X-C - because such solo flying under supervision is considered to be 'training' by EASA.....
Regrettably, 22(Trg) Gp hasn't been minded to write a conversion report for UAS-to-LAPL credit, so at present the path remains UAS-to-NPPL-to-LAPL-to-PPL, but you do NOT need physically to hold a LAPL, instead you need to meet both NPPL-to-LAPL and LAPL-to-PPL requirements, then apply for the PPL.