I’ve heard that Facebook / IG is trying to crack down on botted accounts in preparation for the upcoming US election. They are moving on the side of caution and will disable any account that they suspect of automated behavior. For example, a lot of liking, same comments, mass DM, etc. Be careful with your activities as most disabled accounts will require photo / code verification and access to the email address you have in your account. Most accounts will be banned with no chance of verification. For those that are lucky enough to get this option, re-enabling accounts may take a long time due to their backlog and COVID.
The three appeal forms you can use to try to get help if your account becomes disabled: