Judging by the offices and homes that I visit, wireless charging is used by a small fraction of iPhone owners. Qi charging pads have plummeted in price, so there’s no reason not to start using one if you have an iPhone 8 or newer. AT&T is currently offering a basic, but functional 10W charging pad for $5 with free shipping. These don’t come with an AC charging brick, so you’ll need to provide your own. However, it does include a USB-C to USB-A charging cable. Most of us have extra charging bricks, but if you don’t Best Buy sells its Insignia pads with chargers included. At the time of this writing, a package of two 10W pads with chargers is $15.99. Best Buy includes USB micro-B to USB-A cables.
Note that these pads are not MagSafe chargers, which provide 15W charging with the iPhone 12 and 13. Qi charging will be slower than MagSafe charging, as Qi charging is capped at 7.5W on iPhones. I am not using my Qi pad for rapid charging. I use it for slow charging throughout the day, at my desk. For this purpose, low wattage charging is perfectly adequate.
If you want the full 7.5W charging available to Qi pads that support it, you’ll need a 2A or greater AC charging brick. The small 5W charger that used to come with iPhones provides 1A, so Qi charging would be capped at 5W.