I don’t know what it is but those don’t seem enough. Maybe it fights with sleep somehow but my Xbox is supposed to keep games updated and if I haven’t played in a week I seem to have a download. Annoying.
On Xbox One and Series S/X you can turn on sleep mode, which uses far more energy but makes sure the console never goes without an update. I'm like you, I can go long periods without opening it and this mode keeps my system always up-to-date.