Do Hidden purchases disapper after a year? Please tell me they do!

We can't give you the answer you're hoping for. They do NOT EVER disappear. I have an app I hid years ago, and it's till there today. Purchases don't go away. But they can stay hidden forever.

See how here --> Hide App Store purchases - Apple Support

No

You're welcome.

How do you even hide a purchase? It keeps showing up in my subscriptions even though it expired amd I don’t use it.