Do you have an link for me?
FOTA is in many cases split into phases.
The first is the download. Usually that’s done in a few minutes but sometimes it may take longer.
The second one is to apply the download. In order to tell the McuBoot to apply the download from the 2 slot as update to slot 1, that
boot_request_upgrade and a reboot is needed.
Not sure, what you sample includes/shows, maybe only the download.