@DTS Engineer One other question, we are assuming that if we went through the app store process, even though it's not a public facing app, we would still need to go through the app store verification stage?

@DTS Engineer, Thank you for the confirmation and link, does this mean that both us and our client would need to be members of the Apple Business Manager?

Thank you for both your responsese, greatly appreciated. @DTS Engineer, the app we're developing is for the iPadOS, running on iPad Pros.