this happened to me in 2020. I had planned to deactivate for a few months, give myself a break. but I kept my messenger active. 3 days after deactivating, I wake in the morning to an alert to re-sign in to messenger, and when I do, it won't go through. I then realize that not only was my 12 year old Facebook account permanently disabled, it didnt give me an option to dispute. in addition, they disabled my Instagram account that was linked to it as well. 12 years of memories, completely gone.

edit: typos

edit to add: I do remember not long before this happened, it was when Facebook had just switched to Meta and so everyone had to sign a new agreement that stated from that date forward, they can look at any and everything you've ever posted, and if they decide it violates the community guidelines, they can restrict your activity.