Well, that's because FCL.945 privileges are at the discretion of the NAA which issues the licence:
FCL.945 Obligations for instructors
Upon completion of the training flight for the revalidation of an SEP or TMG class rating in accordance with FCL.740.A(b)(1) and only in the event of fulfilment of all the other revalidation criteria required by FCL.740.A(b)(1) the instructor shall endorse the applicant's licence with the new expiry date of the rating or certificate, if specifically authorised for that purpose by the competent authority responsible for the applicant's licence.
The IAA does not issue FCL.945 privileges. Quite a prudent move, judging by the misunderstanding of many FI / CRI concerning the regulations!