I just did a fresh install.
RPi 3 Model B
Image: ARMv8 64-bit from https://dietpi.com/downloads/images/DietPi_RPi-ARMv8-Bullseye.7z
I did the minimal installation of DietPi by connected ethernet, which updated itself to DietPi v7.7.3.
After that I wanted to configure Wi-fi, but there is no wifi adapter found. Reboot didn’t work.
I did this twice, but it didn’t work.
So I tried this with the official raspios image from https://downloads.raspberrypi.org/raspios_lite_armhf/images/raspios_lite_armhf-2021-05-28/2021-05-07-raspios-buster-armhf-lite.zip . Release date: May 7th 2021
With this image, the wifi adapter is found and I can connect to my wi-fi.
May I ask you for help with debugging? Which information can I provide?