A clipping path is more of a graphic design production feature, and so it has never existed in either Lightroom or Lightroom Classic, which are both tightly focused on photography only.
Photoshop has long contained features for both photography and graphic design, so because clipping paths support graphic design workflows, clipping paths have long been a part of Photoshop. Creating a clipping path in Lightroom would first require Adobe to add tools for creating vector paths, and probably also tools for editing them such as a Pen tool.
You can ask Adobe to add clipping paths by submitting a feature request in the Ideas section here, then try to get enough people to vote for it so that it becomes a high priority. But because cloud-based Lightroom is so focused on non-print workflows like social media (Lightroom can’t even print), it may be a challenge to make clipping paths a higher priority than other requested features that are closer to what Adobe thinks the mission of Lightroom is.