Overview
The M031-B is a module made by M5Stack with 5 pins.
JLCPCB lists it (part C17599073).
Symbol
The library has no symbol for this part yet.
Footprint
The library has no footprint for this part yet.
Questions
Where is the M031-B datasheet?
M5Stack publishes it: the Datasheet link on this page opens it.
Where can I order the M031-B?
JLCPCB lists it as part C17599073, with 0 in stock; the sellers' links on this page open their listings.