There are broadly available third party RP2350 boards with subc and a variety of additional capabilities if that is important for you.

https://shop.pimoroni.com/en-us/collections/rp2350

https://www.sparkfun.com/sparkfun-pro-micro-rp2350.html

https://www.dfrobot.com/product-2913.html

https://www.seeedstudio.com/Seeed-XIAO-RP2350-p-5944.html

Not the point, though I appreciate folks listing links in an attempt to help.

What I am saying is that we're well into 2026 and there's no good reason for RPi not to offer a USB-C version of the reference board for this MCU.