I just wanted to post this here because I want to help you all and hurt gen.xyz as much as possible. I had a .xyz domain through njal.la which I used to host jellyfin, homeassistant, and other basic things for friends and family. My domain recently became inaccessible without any notice. After a while of troubleshooting, I found that it had been reported to xyz as abuse, and they must have done zero investigation whatsoever before serverholding my domain. I thought about opening a ticket with xyz to get my domain back, but realized that I no longer wish to buy from some shitty company that will take down any site without warning. Bought a .com domain since they are somewhat reputable, and I would advise everyone here to never buy a .xyz domain. Angry rant over.
Locks can happen by registrar (I.e.: ninjala, cloudflare, namecheap etc.) or registry (I.e.: gen.xyz, identity digital, verisign, etc.).
Typically, registry locks cannot be resolved through your registrar, and the registrant may need to work with the registry to see about resolving the problem. This could be complicated with Whois privacy as you may not be considered the registrant of the domain.
In all cases, most registries do not take domain suspensions lightly, and generally tend to lock only on legal issues. Check your Whois record’s EPP status codes to get hints as to what may be happening.