It's a remix of the Z axis handle, spool holder, and AMS lite rotary spool holder adapter. The parts (objects) are all adjustable in the 3mf file for further printing parameters adjustment.
You will need an additional AMS lite Rotary Spool Holder (Yellow) for this to work with.
AMS lite Rotary Spool Holder | Bambu Lab Global
A1 Mini Top Mount Spool Holder and Handle (moded with primitives in BambuStudio) 二次创作 - by andre.bar
Adapter for AMS lite Rotary Spool Holder - Yellow / PLA Matte by Piecemak3r