Valve has confirmed that the Steam Deck's storage options are upgradeable as they come with a 2230 M.2 slot. However, the company, it seems, doesn't want end users to upgrade the storage.
All our coverage of the Windows 11 2022 update which is rolling out worldwide
windows 11 2022 update
Windows 11 Beta Channel includes fix for Dual SIM calling, and more
windows 11 insider preview