After receiving the order form and payment, once we are provided with all the correct branding information by the client, it will take 2-3 weeks to build, test and then get a sign off from the organisation.
After this, it is submitted to the stores and barring any issues, it will generally go live 1 week later. So it is safe to estimate a 5-week process.
Please note that the app is published in the client Google and Apple store accounts, so it is a critical step to expedite the creation of those accounts.