For the moment Fedora supports the x86_64 and aarch64 architectures. The components to support ARMv7 are being worked upon and will be added shortly.
The currently tested reference devices are as follows:
x86_64 and aarch64 VMs
Raspberry Pi 3 Model B and Raspberry Pi 3 Model B+
96boards Dragonboard 410c
96boards Rock960 Consumer Edition
Other devices should work, but aren’t being actively tested in the context of IoT. The list of supported reference devices will expand with time.