My bosses at work are all old folks who use iPhones and they always come to me for help with this and that.

Their problems always boil down to the fact that all app settings can only be accessed by going into the system settings, scrolling through all of them to find the app you want and taking it from there. To make it worse, sometimes an app setting will be hidden away under another nested system setting and there's no way to know this without googling.

So frustrating. I see the "user friendliness" of IOS touted all the time but IMO, functionality is so well hidden from the user that they end up accepting and settling for Apple defaults.

The only advise I can give you is to teach your father how to use google to find out how to do stuff on his phone when he gets stuck.