There was an article in Flyer May 2020 (Dave Calderwood, 28/5/2020) I cannot post the URL as new PRUNE member. In short it indicates that 3 axis hours can be counted towards renewal. I have flown a Skyranger since 2006 and always revalidated by proficiency check to maintain my full PPL. I can recall at the last renewal one examiner believed that my 3 axis time counted but the other was not convinced. I therefore did the prof check to be certain. I am now under the impression that I can renew on hours +the one hour instructor flight.
Google search of microlight/hours/flyer soon found the article.
Hope this helps
rob