Why does the 2022 Cycling - Stage 1 challenge have an image of an indoor cyclist, but indoor rides don't count towards the challenge?
Why does the 2022 Cycling - Stage 1 challenge have an image of an indoor cyclist, but indoor rides don't count towards the challenge?
Indoor rides count towards that challenge. All types of cycling counts.
What you are referring to is probably that you can't use Zwift (or other 3rd party services) for that challenge. If you log it with Tacx app or any other Garmin device it will work for indoor rides.
It is a rule for all challenges and badges:
https://support.garmin.com/en-US/?faq=6pECo6UIFn7ergw8kNmfu9