There are 3 different boards here and these are the reasons for the corrections:
For ESP32-S2-DevKitC-1-N4R2, I did a google search and could not find a DevKitC version.
For ESP32-C6-DevKitM-1-N4, the board ID is correct and I was just correcting the name to match.
For ESP8684-DevKitC-2-N4, it should have been formatted slightly different as ESP8684-DevKitC-02C-N4.

For ESP8684-DevKitC-2-N4, it should have been formatted slightly different as ESP8684-DevKitC-02C-N4.

I agree on the above.

For the ESP32-S2 boards, wow, this is confusing. The CircuitPython builds for ESP32-S2 DevKitC boards cover the boards below. They are virtually identical except for the memory differences.
a. 4MB flash; no PSRAM
b. 4MB flash; 2MB PSRAM
c. 8MB flash; 2MB PSRAM

Here is a list of ESP32-S2-DevKitC-1 boards:
https://docs.espressif.com/projects/esp-dev-kits/en/latest/esp32s2/esp32-s2-devkitc-1/user_guide.html#contents-and-packaging

So you can see there were DevKitC-1 and DevKitC-1R boards that were type "b" above. You're right, this does not seem to be an actual product name. I did find traces of this name on some shopping sites. The CircuitPython name is description but is not an actual name.

The DevKitC boards have two USB connectors. The older ESP32-S2 DevKitM boards we never had a build for. They were painful: the USB connector was not native USB: that required a separate breakout.

So I think the N4R2 board should be named Espressif ESP32-S2-DevKitC-1R, maybe with (4MB flash; 2MB PSRAM) in parentheses someewhere, and there shouldn't be an ESP32-S2 DevKitM board. Whether we want to rename the CircuitPython N4R2 board or not is up in the air, but it's not that important, since the board name is descriptive.

Sounds good. I just made the changes you requested.