There are some major issues here. I actually returned my iPhone 12 Pro to exchange it for another one. It did make a difference on some chargers.
My first iPhone 12 Pro would not charge on any of my wireless chargers and all are Qi certified and work with the iPhone X and XS models I had before. This included two different Uniolabs wireless charging stands, one Mophie wireless charging puck and one TaoTronics desk lamp with a wireless charger built-in.
The iPhone 12 Pro I got in the exchange charges on both of the Uniolabs charging stands in both a vertical and horizontal position. It still does NOT charge on the Mophie wireless charging puck or TaoTronics lamp stand even though both are Qi certified. I've tried many different positions too.
Bottom line, Apple hasn't even acknowledged there is a problem with wireless charging. So many countless hours have been wasted by consumers to troubleshoot a brand new iPhone and its inability to do something that has been standard in the mobile phone industry for quite a while. They knew this before they released it too - make no mistake about that.