I hear there is a point where this series had an ending of some kind but then just keeps going, through I have no idea when that was. I presume thats when the mangaka may have been losing interest
A couple of chapters were already translated years back and I've uploaded them here https://mangadex.org/title/d786501b-f01e-4134-83bb-2b8c75aab6b2/mahou-shoujo-madoka-magica-mami-tomoe-s-everyday-life
I will be seeing if i can get anyone to translate some additional chapters. Not sure how much...