Please update the documentation.
I think it would be fair to specify what version of the Arduino IDE to use with the Artemis Apollo.
I have tried the 1.8.12 as specified in various places.
I think IDE version would be polite to specify here:
https://github.com/sparkfun/Arduino_Apollo3

From : https://learn.sparkfun.com/tutorials/artemis-development-with-the-arduino-ide/setting-up-the-arduino-ide
"Note: The Arduino core for the Apollo3 (i.e. the board definitions) is only compatible up to release 1.8.12. We are currently looking into the issue."

There is no sparkfun / apollo in the board manager hen using the https://raw.githubusercontent.com/sparkfun/Arduino_Apollo3/main/package_sparkfun_apollo3_index.json