I am seeking a case that meets my strict criteria:
If you don't mind cases made by companies that aren't popular and may not be reputable, there are a handful of such cases on Amazon. Please note that I am not recommending these, nor do I plan to purchase them because I don't know about their quality and how well they would protect my phone. This is a complete list of every single MagSafe wireless charging case with kickstand made for the S23 Ultra that I can find on Amazon at this time:
There are even more options at lower prices on Chinese-owned websites, such as AliExpress (search results).