Facebook Messenger privacy settings are usually adjusted inside the Messenger app or from the account settings connected to the app. The exact menu names can vary a little by device and app version, but the path is usually straightforward.
Open Messenger and tap your profile picture or menu icon, then look for Privacy, Privacy and safety, or Account settings. From there, you can review options such as who can message you, who can see your active status, message delivery controls, blocked accounts, call permissions, and notification privacy. If the setting is tied to the Facebook account, some controls may open in Facebook’s settings area instead of staying inside Messenger.
If you want stronger privacy, it is a good idea to check active status, story visibility, message requests, and blocked users. You can also review device permissions, such as access to contacts, camera, microphone, and notifications, because those affect how much the app can use and show.
If you do not see the option you want, the app may need an update. You can also look on the current web page for any support or contact information linked to your account or app version.