Twitter re-accepts public requests from users seeking review and introduces new guidelines that must be followed in order to keep the reviewed badge.
All users will soon be able to submit a verification request directly from the account settings screen. Whether an application is accepted depends on whether the user fits into one of six categories that are eligible for review.
Verification requests have been closed to the public since 2017. Twitter has continued to review accounts on a case-by-case basis, although some individuals and organizations deserving of review have been omitted without exception.
Back then, Twitter said it had decided to close public requests as it was believed that verified ID would imply endorsement. That was never the case, and hopefully people now have a better understanding of what a verified badge means.