As you are aware that recently LiberiOS 11 jailbreak tool was released for all iDevices running on firmware up to iOS 11.2.1. However, the main issue with this jailbreak tool was non-compatibility with Cydia.
Cydia being the major component of jailbreak should have been updated before release of LiberiOS 11 untethered jailbreak tool. This mis-understanding between Saurik (Cydia Founder) and LiberiOS tool developer has created few troubles for jailbreak lovers.
Cydia Being Updated by Saurik to Support iOS 11 Jailbreak
Now when LiberiOS 11 jailbreak is already out and thousands of users have already jailbroken their iDevices using this tool, Saurik made up his mind to finally update Cydia.
Weeks after LiberiOS, another jailbreak tool named Houdini11 was released for iOS 11 -11.2.1, but that lacked the same Cydia.
Yes, if you rely too much on Cydia jailbreak tool, then good news is that Saurik has started to update his APT repository. This is clear sign and indication of update work on Cydia in progress.
Hopefully, we will be able to get Cydia support for iOS 11 LiberiOS jailbreak tool sooner than expected.