Over at the airstream forums (where I also do some electrical advice, I've fixed an airstream with electrical issues) that the even the newest WFCO has two disastrous issues with LFP batteries:
(1) It falls into float stage at only about 70% SOC;
(2) The charging voltage has been measured, carefully, to be only 14.35 Volts. That's not enough to get cells balanced.
So I STRONGLY recommend staying with a PD, a WildKat (a modified PD, I've been using those exclusively), or a Victron. PD 4655VL and WildKat mainboards easily replace the WFCO converter boards in about 30 minutes, with only 5 wires disconnected and reconnected to the new Converter. (That's for a first-time replacement person. After all the practice I've had, it takes me about 5 minutes.
)