If you are looking for beta updates for built-in Windows receiving features (like "Project to this PC"), these are managed through the Windows Insider Program Beta Channel
Beta software is unfinished software. For a tool as fundamental as a remote receiver—where you rely on it to log into your work desktop or critical apps—the risks are significant: windows receiver beta
There is no official standalone product currently titled "Windows Receiver Beta" from Microsoft or major manufacturers. However, this term typically refers to beta programs for specific software that enables a Windows PC to act as a receiver for external devices or remote applications. Useful Post: Windows Receiver Beta — Quick Overview