Lane assist is not available

My 2019 L&K Skoda Superb estate, didn't have lane assist activated when I bought it, used, from a dealership, in 2020 (who had as their demonstrator). I was told by the sales person that it did have lane assist, but by now, I was back in Ireland. However, one of the Briskoda members set it up for me when I visited the UK a few months later and apart from the odd occasion when it didn't activate, but was activated via the head unit, the system has worked fine, up until yesterday, when I had the vehicle in at a Skoda dealership for a pre NCT (MOT) check, when I asked them to upgrade the navigation maps, as well. It was returned, okay for the NCT, the front camera was updated, but getting back into the vehicle I noticed the lane assist wasn't working, but thought it was just another of those glitches that could be fixed via the head unit. When I arrived home, I tried to reset the LA, without success, so I had a go with my OBD11, for two other errors and reset them, but couldn't find any errors on the LA, so went through the apps on the OBD and tried to reload the LA, but the message came up that this was not available on this vehicle.

Does anyone have a fix for this, please?

I am due to go back to the dealership in a fortnight's time to try fixing the LA and the map update, but don't feel confident of it being fixed and would prefer to try doing it myself, first.