That’s incorrect.
Overbridge 2 is for AF Mk1, AK, and AF Mk2.
Overbridge 1 supports AF Mk1 and AK but not AF Mk2.
AF Mk1 and AK have restricted USB bandwidth and so according to Elektron these two devices “support a maximum of 8 channels per direction in Overbridge, and a total of 10 channels (in- and outputs) running simultaneously”. Consider whether that is sufficient for your needs.
AF Mk2 does not have this hardware limitation and so you can have 8 inputs and 6 signal outputs simultaneously.
Read here for full documentation on the Overbridge 2 public beta: