The KIWI310 is a new single-board computer (SBC) built around the Raspberry Pi form factor. The SBC features an x86 processor rather than an ARM one though, and supports 5G connectivity.
https://www.notebookcheck.net/KIWI310-New-single-board-computer-launched-with-an-Intel-Celeron-processor-and-expandability-within-a-Raspberry-Pi-form-factor.579342.0.html