Repair guides and disassembly information for the 16-inch MacBook Pro released in October of 2021, featuring Apple-designed M1 Pro and M1 Max SoCs. Model A2485.
Sadly, no. Any MacBook Pro from 2016 on have storage that is soldered directly onto the board. So it is effectively not upgradeable. Same goes for RAM and is extra complex on these M1 machines because the memory is a part of the actual M1 SOC.