MicroMod RP2040 Processor
RP2040 chip designed by Raspberry Pi is also available on boards from Sparkfun.
Utilizing the MicroMod M.2 standard, you can easily connect a MicroMod Pi RP2040 Processor Board to your choice of Carrier Boards.
The Raspberry Pi foundation provides excellent documentation for programming the RP2040 using either MicroPython or C++.
More information is available on the website of Sparkfun.