[Android Apps and Games] Vesem:
Well, that is certainly a straightforward answer.

Your conclusion that this would "be confusing and leave people wondering" rests on some assumptions that are worth examining:

That setting up additional accounts later in their existing Android email app is a task that users will need to engage in with some frequency.

That this same category of users (people who are likely to be adding and editing multiple accounts & identities in an opinionated, privacy-oriented Android email client) have never before encountered a one-and-done setup wizard, and thus would find it confusing to find the same setup items—un-numbered but with the same names they had in the wizard—presented alongside additional configuration items in the first screen that comes up when they hit the menu item with a 'settings'-ish name and a gear icon.*

That the path [inbox → nav menu → the item with a 'settings'-ish name and a gear icon → tap the 'Add account' button right beside the summary view of your existing accounts under the 'Accounts & Identities' header] is somehow more convoluted or counterintuitive than the path [inbox → nav menu → the item with a 'settings'-ish name and a gear icon → tap the 'Manage' button under the "Setup accounts" header (which is prominently marked as 'Done') → hit the floating add button].

* But those same users won't find it confusing for "the menu item with a 'settings-ish' name and a gear icon" to lead to two entirely different screens depending what screen they're on when they tap it, and won't be left wondering "notification settings... which screen are those in again? Did the dev file them under 'setup' or 'options'?".

Those first two assumptions seem... questionable. The third one, I simply can't swallow.

If you're not going to change the current arrangement because it's a bunch of work and you don't think there's enough benefit to be worth it, then fine, cool. Obviously that's your call to make, and I won't pretend to have any real idea how much work would be involved. But you then go on to argue that a simplified and consolidated presentation of setup tasks, configuration items, and options would be confusing. This claim is entirely mystifying.

Between your posts and your design, you have made it pretty clear that you don't think people should touch the options, yes.

Well, no, of course not. The configuration items that you have promoted to first-class status by deeming them 'Setup tasks' and placing them in the first screen that users encounter when they hit the menu item labeled with a 'settings'-ish name and a gear icon don't suffer from your disdain for 'options' and aren't tucked away behind a button at the bottom of that screen below the 'Read messages' header. Those items are doing just fine. The entire point of my suggestion is to bring the rest of the configuration items up to the same level of discoverability and accessibility that the 'Setup tasks' already enjoy. If it also trims a step out of the path from the inbox to adding a new account, that's a minor and incidental perk.

As for there being nothing fundamentally wrong with the current setup, well, it seems like we've reached the point of "agree to disagree". Thank you for giving my input a thorough hearing, anyway.

By the way, I was pleased to see the added option for notifications without message previews, which raises a minor point: isn't the usual design convention for the ticky to be grayed out on options pertaining to features that are unavailable on the free version? Given that FairEmail's free version doesn't show previews in notifications, I would expect that item to be un-ticked as well as grayed out, and then—since the pro version's default is to show them—automatically switch to ticked when it becomes available upon buying the pro upgrade. This is not a strong opinion or anything, I just found it a little surprising.