The launch of the next-generation Mac mini appears to be close, if Apple Studio Display is anything to go by. According to developer Steve Throughton-Smith, the firmware mentions the unreleased mini-PC, which is expected to be considerably more powerful than the existing Apple M1 model.
https://www.notebookcheck.net/Apple-Studio-Display-firmware-provides-clues-about-the-next-generation-Mac-mini.613468.0.html