Molekule Air Mini+ devices purchased directly from Apple or Molekule.com (US and Canada as of January 2021) are HomeKit enabled.
If you see the error message ”Could Not Add Accessory Unsupported HomeKit setup code" when scanning the QR code from the bottom of the device, follow the steps below to continue setup:
After selecting Add Accessory in the Home app, tap "I Don't Have a Code or Cannot Scan".
Select Molekule Air Mini+.
Manually enter the HomeKit setup 8-digit code which can be found under the QR code.