@sumudu I don't think so, because I have Spark, Dispatch, Outlook, Airmail, and the native Fastmail app. (Oh, and of course Apple Mail. Can't forget that one.) I use 2FA for all my email accounts (all online accounts where I can, really) and if I wanted to use a different app, I don't want to have to create a new app password for it.
// @paulgit