This is a simple Magnetic Paper Towel holder. Print two copies of the part using PETG and use a dab of super glue and pressure to set a 10x2mm disc magnets into the back recesses. You will need 18 for each half. It is a good idea to use a wooden dowel to push the magnets in place.
I have posted two STL files. v2 has a little more clearance with the magnets and may require more glue. v2 also will accommodate larger rolls.
https://www.amazon.com/DIYMAG-Refrigerator-Magnets-100-piece/dp/B0753ZPBLQ
The author hasn't provided the model origin yet.