I to ordered on 2nd April, a GT Line -S Mhev and spoke to my salesman last week, he still maintained delivery July/Aug but hadn’t yet had confirmation of build. Think it depends on the model rather than Motability, mine isn’t the full hybrid and therefore not as desirable at the moment which is why I ordered it in April. Would be a big mistake for them bearing in mind the number of Motability customers they have if they do decide to prioritise other buyers.
Good luck and fingers crossed.