If a domain shows as unreleased, it means that upon manual review, it may get released either as a premium domain or as a protected domain.
Premium domains are short, common and popular names which we have been releasing carefully on a consistent basis by category. As of now, you can find the list of current premium domains that are for sale here:
Protected domains are domains that we've detected are associated with a brand. We have been very clear since we started providing domains that we will protect domains for brands as it helps with web3 adoption. Our systems for protecting domains has seen a gradual improvement over time.
If the protected domain is your brand, please complete this form for the team to review it: https://unstoppabledomains.com/tm