The regulation
Whopity quotes was a last minute (French?) bodge introduced when the 'LAFI' proposal was canned.
So yes, if you obtain a CRI certificate you may conduct the training flight for PPL/SEP holders, but not as a LAPL-restricted FI.
The whole daft nonsense would disappear if EASA were to adopt the original proposal
not to require CPL-level theoretical knowledge for PPL FIs. But they won't, as certain Member States will vote against any such change as they won't support what they perceive as non-compliance with ICAO requirements....