If you host MongoDB externally, you need to manage the backups. You can use these helpful articles from MongoDB that explain all possible backup options.

Kendis supports MongoDB version 5.0 and above (If you have an older version, then upgrade)

In case you would need to restore these backups, you would need to use "mongorestore" , more info at https://docs.mongodb.com/manual/reference/program/mongorestore/