@Borris Hyundai dealers can look at every car that is in stock at Tilbury docks (there are many hundreds) so can tell you at a glance which colours (exterior and interior) are available for immediate call off. If your dealer isn’t showing you this then I’d speak to a different Hyundai dealership. If there’s one in stock they can call it off and you should have it in 3 or 4 weeks. I suspect that the choice of paint is the stumbling block, but I’d still check elsewhere.
When we ordered our Tucson Ultimate PHEV a few months back, people on the Tucson forum were saying that they’d been told by their dealers that the new Cypress Green colour was not available until next year. Our dealer said this was nonsense and could get us one in two of the three interior trims within weeks – which he did.