The brochure needs updating... it refers to pre 1st July models. 'Trophy Connect' model was essentially renamed as 'Trophy' with the roof being deleted and rear privacy glass added instead, which you can see under the specs here:
New MG ZS EV | Electric SUV
Personally I've not seen anything to indicate that lease takes precedent. I was actually told when I was initially enquiring at MG dealers, that there's better margin in customer cars (plus there's finance deals) so they look to satisfy those first. Whether that bears out in reality I don't know...
I'd guess the dealer is just quoting the standard 4 month lead time. That being said, when I keep in mind all the 'spare' SR that turned up even though the LR went on sale first, nothing would surprise me.
As to built cars sitting in China awaiting transport, that's no surprise...just good to get a better idea of the timeframe. I'm sure Miles has covered in the podcast some time back about the competition for shipping slots as well as the increased cost. This is why I'm interested in whether SAIC have got their ships online yet as you'd think it'd speed things up.