Re simulation accuracy, assessment, etc.
Cautiously ask the instructors what the landing performance is based, their perception of touchdown point vs that assumed in performance data.
Also, query the use of 'touchdown zone'; this is an old term without meaning in commercial operations, particularly with the introduction of TALPA calculations.
These aspects are referenced in the updated version of AC 91-79B FAA Aircraft Landing Performance and Runway Excursion Mitigation,
https://www.faa.gov/documentLibrary/...91-79B_FAA.pdf
3.9 Touchdown Point. The touchdown point used in the landing distance assessment reflects the assumed air distance. Operational landing data usually includes an allowance for 1,500 ft or 7 seconds of air distance from the threshold to touchdown.
5.2.4 Landing Beyond the Intended Touchdown Point. AFM/POH distances are based on a touchdown point determined through flight testing procedures outlined in AC 23-8, AC 25-7, and AC 25-32. If the airplane does not touch down within the air distance included in the AFM/POH landing distance, it may not be possible to achieve the calculated landing distance.