Now that you have your board being correctly detected, the next step is to create a Pull Request to the Adafruit_Python_PlatformDetect repo. If you are not sure how to create a Pull Request, check out this page from the GitHub guide we mentioned earlier. You'll want to be sure to run Black to format your code as well as Pylint so that it passes the automated code check.
This guide just covers the first part of adding a new board to Blinka, which is correctly detecting the board and chip so that Blinka knows what to do. The second part of adding a board to Blinka is covered in the guide Adding a Single Board Computer to Blinka.