It is compatible with cyclone v, the documentation is kind of messy, but it is possible to set the board to use FPPx32 if you are configuring the fpga using the hps. (I need to find the correct document, but it’s in one of the cyclone v manuals)
In order to create a compatible rbf file I’m using the following configurations for my device in quartus:
It is kind of weird but the board should work with the generated rbf file, I’m able to configure the FPGA using u-boot and linux devicetree-overlay methods.