Thanks for your comment.
Chess.com Support for Millenium Exclusive and King Performance via ChessLink

I followed the video and the readme in github of Tiffany's Chess, I setup username and the token in the options dialog of Tiffanys-UI. I have ongoing/open games on my lichess. However, when I click 'Lichess.org' button, nothing happens!
The USB connection is fine. HIARCS Chess Explorer v1.9.4 has no problem to communicate with ChessLink & Millenium Chessboard through USB on my PC. I am able to play chess on Millenium Chessboard via HIARCS Chess Explorer v1.9.4.
I have openJDK 14 installed on my PC. Not sure whether it is required. I also disabled firewall to make sure Tiffany's Chess is not blocked.
Not sure why Tiffany's Chess does not work on my PC?
Anyone has any good luck to use Tiffany's chess to connect to lichess and play on Millenium board ?
This is so cool! But why doesn't chess com do anything? Do I need to go to another site? I even bought a diamond account!

There's now an new app from Millenium that allows connection to Lichess via ChessLink, works extremely well, now I'm just hoping for a connection to chess.com

Getting close. Now there are connections to Arena, LucasChess, LucasChessR, and Shredder (also Hiarcs from their developers). So chess.com has to be close.
http://www.talkchess.com/forum3/viewtopic.php?f=2&t=75826

I've tested the Lichess connection - very stable, exactly what I was looking for. Hopefully chess.com enables the same capability!

I also used the android app Chess-Link to play on Lichess. It's stable but I don't see an option to invite some friend to play a game. An option to send an URL to start a game with someone you know.

Ladyhawke79, the way I do it is to set up your board using the Millenium ChessLink app and then log into Lichess on your computer. Use the app to start a game against the computer, then resign. Then, you can join a game by challenging your friend on your computer. When your friend accepts the challenge, the game will also load automatically into the ChessLink app, allowing you to use the board. Keep Lichess up in case the board drops out, so you can pick up where you left off.

Thanks TechnomanSlade.
I will try this out. How did you find this solution? Are you part of the development team of Millenium ChessLink app?

How do you start a game against the computer with the app Millenium ChessLink? I don't see an option for this. I have version 1.0.1
And is it possible to play against Maia https://www.reddit.com/r/chess/comments/k4o6z1/introducing_maia_a_humanlike_neural_network_chess/
On the Millennium Exclusive board somehow.

lichess+ chesslink https://www.youtube.com/watch?v=cvk2xubO2Oc

I have installed the latest updates to my Millennium Exclusive 960 edition. At least I think I did because I didn't get an error message. How can I test if I have the latest updates installed? There should be a setting now to set the brightness of the LEDs on the board. I don't find these settings? I also read that with the latest update for King Performance there are nieuw adaptive playing levels. Is this also include for the latest updates for the exclusive boards?
Since the psuedo-UCI link supports Windows, I believe that will be supported whenever the chess.com interface is worked out.