Due to the ongoing impact of the Coronavirus, all orders can take up to three weeks, and in the case of BTO *(Build to Order) machines a bit longer. There is no way around this, as even standard iMacs are now in restraint. You can check it against Apple/Amazon/John Lewis etc. This is the same for every supplier, so it will not be just us, it's even direct from Apple's UK website.
So it short, the sooner you get your order in the better! There is no faster way to get these, so please do not ask. We would rather be up front with our customers before they purchase, so you have reasonable expectation. We will update this when the situation changes, as it will return to normal when supply can catch up with demand. But get your order in the queue as this is not changing any time soon.