First, please read the first post and the description how motion detection is done in this app.
It’s not based on any trigger or push message. It’s based on already recorded video.
When you turn a camera device on in Homey, it won’t record. It just turns on the motion recognition for the camera. I think that’s what you want to do in the first flow. You should see in Blink app that motion alert is turned on in Blink app.
Your second flow won’t work in real scenario. If a motion is detected, the camera records. If you have cloud storage active, the camera still records while the flow is started. In this case, you can’t record again because the camera is busy.
Just send you a push message from Homey to check it this flow is started.
Did you send a diagnostics report today?