Chosen Solution
A few days ago I was charging my AirPods and i plugged in my charger why airpod light wouldn’t turn orange (which shows when it’s charging) instead it kept flashing orange I brought different chargers but none of them work on my AirPods it worked on my phones and iPads tho. I think there was a problem with my case
You said that you have tried other chargers but have you also tried other wall pieces, a computer or power bank? Have you tried resetting and re-pairing the AirPods? Can you see the battery status of them on your phone? Are the AirPods and your phone running the latest firmware, that could be playing a part? Have u cleaned all the connectors and ports of your Airpods? Do you have a wireless charger you could test them with?