Motorcycle and car magnetos were equipped with simple advance/ retard mechanisms from very early in the history of the internal combustion engine. The early ones were manually set, e.g. via a rotating plate holding the points and adjusted via a lever and cable, but later ones do have automatic advance, working on a centrifugal mechanism. My daily transport used to be a BSA A7SS, with an advance/retard lever on the handlebars so I quickly got used to adjusting the timing and have often thought it strange that aircraft mags, in general, despite being more prone to detonation, weren’t normally so designed (apart from the “impulse” mag starting device to avoid kick-back).
I’m sure someone here will tell us that some aircraft mags do have them….