Different markets always have different specifications. Obviously, the Q3 market in right hand drive models, the option is not financially viable. Why do I say right hand drive? Well, the wiring harnesses for each spec and option are different. If the demand for optional electric seats without the figment of other items is not there, then the cost of producing unique wiring harnesses is financially unviable.
I have seen the production of a wiring harness, it’s not just sticking a few wires together on a board.
The option pack will be item specific which require the same harness to operate.
I do understand your frustration with the cars available on the scheme and the specifications available.
however it is what it is, and either you forgo one of your needs or leave the scheme and yse the money to buy your own car.
I woukd lije the Škoda Superb estate 4×4,Mobutu unless price caps and APs are raised, it won’t happen, so I will have the front wheel drive version and add snow chains/snow socks for bad weather
tge only other option you might want to investigate is speaking to Motability and see, with your specific needs they would allow a spec away from standard but this may include a big AP.