How to transfer files from PC to Android via WiFi without special software?

[Android 11](https://en.wikipedia.org/wiki/Android_11) came out in late 2020, when most home networks use WiFi. After searching for hours, I have been unable to find a built-in way of transferring files from my Windows PC to my Android Pixel (and ideally the reverse, too) without downloading a special app from the Play Store. This is shocking to me. Is it really the case that Android doesn't natively support WiFi file transfer? [I'd rather not need to search for (and decide whether I trust) a third-party app. And I'd certainly rather not use a physical cable for file transfers like it's 1990.]