You can log your PF time as PICUS.
The following is a section of LASORS
Provided that the method of supervision is acceptable to the Authority, a Co-pilot may log as PIC flight time flown as PICUS, when all of the duties and functions of PIC on that flight were carried out, such that the intervention of the PIC in the interest of safety was not required. (For further details please refer to Co- Pilot paragraph at the end of this Appendix).