We're almost ready to ship shared ports. Tracking a meta release checklist here.

Before release:

• Add documentation Documentation for Sharable Ports and Protocol selection  #13070
• Capture screenshots for changelog (PMs)
• Communicate to marketing for the release blog (PMs)
• Remove experimental flag

For posterity, docs here:
https://coder.com/docs/v2/latest/networking/port-forwarding#sharing-ports