Does the M300 RTK support PPK post-processing when used with the P1?

Name: heliguy
Address: Unit 9, Jupiter Court Orion Business Park North Shields Tyne & Wear NE29 7SE, GB
Telephone: 0191 296 1024

Yes. The task folder stores photos, original GNSS observations, and TimeStamps.MRK files, which are used for PPK post-processing calculations.