The Epic-supported Maya Live Link plugin is now deprecated and has been replaced by the Autodesk-supported Unreal Live Link for Autodesk Maya plugin.
The Unreal Live Link for Autodesk Maya plugin can be found on the Unreal Engine Marketplace here: https://www.unrealengine.com/marketplace/en-US/product/f2e37c4b943f4337b352e1639fa4ebe3
The source code and all future development and maintenance of the plugin can be found in the Autodesk-supported repository here: https://github.com/Autodesk/LiveLink
Older releases of the Epic-supported Maya Live Link plugin for Unreal Engine 4.27 and earlier can be found on the Unreal Engine Marketplace: https://www.unrealengine.com/marketplace/en-US/product/maya-livelink
Or on the "Releases" page of this repository: https://github.com/ue4plugins/MayaLiveLink/releases