Disappearing paid for Apple Library of TV shows & movies.

Did you try to download them again, using the Purchase History on your iPhone?

...

• Make sure that the item is in your purchase history for your Apple Account. If you don’t see the item in your purchase history, you might have purchased the item with a different Apple Account.
• If you don’t see an app that you want to redownload, that app might not be compatible with your device. For example, an app that you bought for your Mac might not also work on your iPhone or Apple Watch.
• If you don’t see items in your purchase history on other accounts, the purchases might be hidden. Learn how to redownload hidden apps or unhide music, movies, TV shows, books and audiobooks.
• Do you want to redownload an app or other content that a family member purchased? If you have Family Sharing, you can download shared purchases.

...

If there is a problem when you redownload

• Learn what to do if you can’t download any apps on your iPhone or iPad or you can’t download any apps on your Mac.
• Can’t connect to the App Store, iTunes Store, Apple Books, or Apple TV app? Learn what to do if you can't connect.
• If you see items in your purchase history but you can’t redownload them, report a problem.

...

copied from: If there’s an issue when you redownload apps, movies, or other content from Apple - Apple Support

Or did you change the country/region for your Apple Account recently?

This might also be a reason for having to download content from Apple again.

Change your Apple Account country or region - Apple Support

Thank you for the reply. Everything I purchased is gone on my iPhone and weirdly rearranged on my iPad. Nothing was changed on either - no apps, not the country/region. I used my iPhone in the morning to listen to a few things while working at my desk and in the afternoon everything was gone except for a few movies.

I didn’t see the how things were rearranged on my iPad until today. I still have everything I purchased, they are rearranged in odd orders or duplicated.

I’ve had an iPhone since they came out. You’d think Apple would still have a Customer Service number where you could discuss the problem with a real person but it seems good customer service doesn’t matter anymore - anywhere in this country, not just Apple. Ah well. I guess it’s time to find a different company and get a phone for only communication and navigation. Thanks again for the reply.