Under which appointment and accreditation does NMi perform its services?

Yes, this is possible. But it is not immediately necessary. Module B certificates from NMO remai

For EU NAWI and MID, NMi Certin is designated by the Dutch government (Ministry of Economic Affairs) and RvA, the Dutch Accreditation Service.

For the UK NAWIR and MIR, NMi Certin UK (TIC) Ltd. is accredited by UKAS under accreditation number 23275. NMi Certin UK (TIC) Ltd. is appointed Approved Body by BEIS under number 8506.