My Yamaha Reface CS works too - plugged in with a USB cable to the USB host socket. That's a better choice than the PSS-A50 because it has a pitch bend lever, and 13 sliders/faders that send a continuous CC value, from 0-127... actually 14, if you don't mind using one with detentes (the Poly / Portamento selector isn't just a multi position switch - it can send values in between the positions).
Those can be assigned to control A, B, C & D (in the anyma phi settings menu), which is more convenient than turning the encoders.
The Reface CS can't take power from the anyma phi though - it needs an external DC supply, or a set of batteries.
I have the others in the Reface series, so if anyone wants me to check a particular one, let me know, but I assume they all work the same for USB-MIDI. The other logical choice would be the Reface CP, because it has 8 knobs that send continuous CCs, but no pitch bend, unfortunately.