From EASA FCL 470.A
(b) Revalidation of single-pilot single-engine class ratings.
(1) Single-engine piston aeroplane class ratings and TMG ratings. For revalidation of single-pilot single-engine piston aeroplane class ratings or TMG class ratings the applicant shall:
(i) within the 3 months preceding the expiry date of the rating, pass a proficiency check in the relevant class in accordance with Appendix 9 to this Part with an examiner; or
(ii) within the 12 months preceding the expiry date of the rating, complete 12 hours of flight time in the relevant class, including:
– 6 hours as PIC;
– 12 take-offs and 12 landings; and
– a training flight of at least 1 hour with a flight instructor (FI) or a class rating instructor (CRI). Applicants shall be exempted from this flight if they have passed a class or type rating proficiency check or skill test in any other class or type of aeroplane.
(2) When applicants hold both a single-engine piston aeroplane-land class rating and a TMG rating, they may complete the requirements of (1) in either class, and achieve revalidation of both ratings.
(3) Single-pilot single-engine turbo-prop aeroplanes. For revalidation of single engine turbo-prop class ratings applicants shall pass a proficiency check on the relevant class in accordance with Appendix 9 to Part-FCL with an examiner, within the 3 months preceding the expiry date of the rating.
So it appears that yes, a TRPC in a Citation would count instead of the 1 hour flight with an instructor in an SEP. But it doesn't get anybody off the hook to have the hours on type, and if they don't, they will have to revalidate by test in an SEP.