Each discord server can decide whether they only will allow people with a phone number on. When you hit one of those, Discord will ask you for your number.
Those require a phone for you to send messages and interact. It will ask you to 'Verify phone', but you can chose not to and stay on the server as read-only, Discord itself won't bother you about it. I am on a few like that for quite some time.
Those require a phone for you to send messages and interact. It will ask you to 'Verify phone', but you can chose not to and stay on the server as read-only, Discord itself won't bother you about it. I am on a few like that for quite some time.