Here is a model for a DIY USB-C Charging adapter for all fossil smrtwatches with the magnetic charging ring type.
You need:
USB C Jack
2 Pogo pins
5.1Kohm Resistor
10x5mm Magnets
USB-C: https://aliexpi.com/FEGl
7mm Pogo: https://aliexpi.com/fHhx
4x2mm Magnets: https://aliexpi.com/ifjA
you can print the top and bottom part seperated and glue it together afterwards.
the pins are 5 Volts without any logic besides the 5.1k resistor which is required for some chargers, see pictures for the circuit.
The author hasn't provided the model origin yet.