To access YouTube Community tab, you need 500 subscribers and your channel’s audience type should not have “made for kids,”.
YouTube creators with over 500 subscribers get access to Community tab and Community post.
Once your channels cross 500 subscribers, you can see the Community tab feature in your account. Here, it may take up to 1 week to get the Community tab after full fill requirements.
Here, you need to note that, Community tab is turned off for channels, whose audience is set as “made for kids,”. Also, you can’t create or view posts.