I share my library with a few users. I (owner of the server) have a lifetime Plex Pass, and have had it since September 2021. All users have the ability to download, and I double checked that they all have Download enabled on my end.
There are specifically two users who no longer have the Download button/option on their iPad. I have asked them to double check that their apps are updated, they are. Still nothing.
I assumed I would be grandfathered in, since my Plex Pass was purchased prior to 2022.