Hello! Yes these are provided with PNG version too. But it will be a bit different from what you see in the preview GIFs. The GIF are records of MZ version ( 60 fps ). RPG Maker MZ does not use PNG for animations.
The PNG version are designed for RPG Maker MV ( but can be used in any other engine, overworld, wherever you want). Please keep in mind since they are designed for RPG Maker MV it will be spritesheet made of 192x192 cells.