It can take up to 1 week to see the Community tab after passing 1k subs. Otherwise, if you have more than one Community Guideline Strike on your channel then you won’t be able to use the feature. Hope this helps!
Please send a feedback report directly from YouTube: https://goo.gl/WdI0BK . While every individual report may not get a direct response, we do review everything and use the details to investigate and fix issues. Thanks.