Valve has released a feature to the SteamVR stable branch that adds basic hand-tracking to Steam Link for Quest users.
The new SteamVR 2.8 update allows Quest users to experiment with input bindings to enable hand-tracking through Steam Link.
Valve also made bug fixes and improvements to streaming stability via Steam Link in the update.
Valve's continued work on Steam Link may indicate its development of a standalone headset codenamed 'Deckard' to compete with devices like Meta's Quest lineup.