It's not that ReTX is on for the downstream and off for the upstream due to your type of modem. The lfcg command should show it's enabled in each direction, if not, the lfcs command can enable support for it, if that can't, then that'll be because your VDSL firmware version is old (I think 5.7.x.x.x.x and later versions have upstream ReTX support). It's on for the downstream and off for the upstream because that's how Openreach choose to do it (granted how Openreach choose to do it is partly due to modems lacking support for it years ago).
Unfortunately the lantiq commands do not properly handle more than one bearer channel, so those framing parameters including the interleaving depth for the downstream could be for the other bearer. In any case, I don't think you can determine retransmission high or low from the interleaving depth.
If g997csg 0 1 gives ActualImpulseNoiseProtectionRein, then that's the INPRein figure, 0 indicating ReTX low and 1 indicating ReTX high. The lantiq commands output INP values in units of 0.1, so ActualImpulseNoiseProtectionRein=10 would equal INPRein=1.00.