My suggestion to anyone looking for new wireless charging accessories for their their new phones is to wait, if possible, for the dust to settle, and let others be the guinea pigs.
The MagSafe system in the 12 series is brand new, and it will take time for 3rd parties to adjust to its quirks and needs, and to introduce products accordingly.
Early experiences and the appearance of the "Made for MagSafe" branding suggest that Apple may have gone to a proprietary protocol its 15W profile, in addition to the magnetic physical attachment provisions encompassed by that moniker.
I wouldn't bet against that case, so the question then becomes whether Apple will require 3rd parties who wish to employ its PPDE to go through its MFi program, or allow the WPC to administer that certification, as Samsung does with its PPDE.