Constantly having to re-login to Apple TV

I’m having problems with the Apple TV app on Fire TV sticks constantly requiring me to sign in. I have 7 Fire TV sticks across multiple generations in two different homes & it’s a seemingly endless cycle of launch the app, being required to sign in, watch a show, don’t watch Apple TV for a day or two, come back to watch another episode & being forced to sign in again. Apple escalation support told me this was expected because Apple is all about “security & privacy”, but I fail to see what forcing me to sign in constantly has to do with security or privacy. I have pretty much every other major streaming platform on these Fire TV sticks and not a single one of them requires this at any kind of amazingly short intervals like Apple TV. If I go a month without watching Paramount+ it might ask me again, but it’s rare.

I’ve uninstalled, reinstalled, cleared data, cleared cache, rebooted the sticks, power cycled the sticks, ensured both the app & the stick itself are fully updated, nothing seems to change the frequency at which this occurs.

I love the content on Apple TV. Silo & Foundation are second to none, but this is maddening. I just want to watch my shows on a service I pay for. Any help would be much appreciated.