I've got an iPhone 11 Pro and 2 wireless chargers: an IKEA Rällen and a Nillkin car holder/wireless charger. They both work from time to time. But most of the time they don't charge the phone. For example, one day I place the phone on the charger and it would start charging, the next day — it would not charge. No indicators, no chime - nothing. After I restart the phone (which is not such a pleasant thing to do) it might start charging. But only once. The next time (e.g. 1 hour later) it would refuse again to charge and restart would not help this time.
Looks like it's a problem of the iPhone 11 — because when the chargers don't charge the phone, they work normally with Airpods Pro.
Both devices worked 100% of the time on my previous iPhone X, until I updated it to iOS 13 (or maybe 13.2). But my iPhone 11 works rarely and inconsistently. I hoped that one of iOS updates would fix the problem, but neither iOS 14, nor iOS 14.2 Beta fixed it.
It's still broken 95% of the time on both chargers.