You have a made a good start but still have Sovol junk hanging around. Eddy-NG? Shouldn’t you get the eddy to function before adding complications?
I don’t have much insight into your particular problems. Things I’d try if I were you.
First I 'd try flashing latest Klipper FW into the Duo. Probably not a fix but worth a shot.
Also Lowering the i2c_speed in your [probe_eddy_current btt_eddy] might be helpfull.
If all else fails, put a U2C in the motherboard port and flip the switch on the Duo.