Can't pair Garmin Fenix 5X Plus with Airpods

Hi guys,

I'm wondering if anybody can help me here. My Garmin Fenix 5X Plus doesn't pair with Airpods. It says 'sensors not found'. I'm keeping them literally next to each other when trying pairing.

The airpods are okay, I can pair them with phone or PC without problems. Also in the past, I have paired the same airpods with Garmin correctly, so I'm sure the prodcedure for pairing is correct and I do it correctly, so what can be wrong please?

thank you!