Planet will need to schedule in a production slot with the factory to have their Geminis manufactured.
Let's say, for discussion, that the next production slot for Gemini begins 26th March (there has been some indirect suggestion that it will be around then).
So all components need to be ordered in, be checked and ready to start, including keyboards.
Assuming they use the same production workers from the previous run, and they are mostly already trained.
So, depending on how much line time they have in the slot, perhaps another 1000-1500 Geminis are produced, which then go through the delivery logistics process, being delivered over a 2-3 week periods. How far up the order number list will be fulfilled for this is not easy to know, because most orders are 4G upgrades and accessories - each one of these takes one order number.
Then the same cycle will start again around the end of April.