Hey @Beaconzone welcome to the forums!
OpenCart creates their own integration, so it’s up to them to update their integration to include SCA functionality. As far as I’m aware, Square informed all of our partners about this when SCA was released within Square, which was June 2019, so I’m not clear on why OpenCart is saying they’re not aware of it.
I’ll follow-up with our internal partnerships team to find out why OpenCart is replying with that information, as it seems to be inaccurate as far as I know. I’ll let you know once I have more information.