I looked at "FPGA" development boards available on Digi-Key. Out of maybe 6 PDF documents from different manufacturers, I couldn't find anything that said anything about FCC, EMC, or other regulations.
One could casually ask their various on-line or FAE resources about what they do for FCC approval of development boards due to internal corporate requirements, etc. to see how they go about it.
Alternatively, you could get one of theirs, set it next to an AM radio, observe interference, then ask a technical question about it and see if there are any reports they can give you.