Hello I don't know if its possible yet but if not it would be great to have this feature. But i dont know if there would be any negative things with it.

Would it be possible for a future update of SPPB that we get a feature in the images integration that we can add a regular (big image) and an alternative mobile (just if someone wants to offer a smaller image). Like it is possible withe the html picture srcset.

Thanks for your great work