Actually Tedhong is asking a question more complicated than the app doc DeoVR provides.
If you use Quest 3 native browser to go to https://deovr.com/hub, you will see an interesting DeoVR website with a big blue "Enter VR" button. This is what Tedhong is referring to.
Of course Tedhong thinks it's the DeoVR's way of web integration. Cannot blame him of that mistake. After all he's not an employee of DeoVR.
The DeoVR hub is actually the WebXR app DeoVR has been developing for a long time. It looks and acts like the native app, but under the WebXR standard. It's a great little secret thing DeoVR has under their sleeves.
However, since this WebXR app is designed for DeoVR.com only, the normal users like Tedhong and us will not be able to utilize the nice interface of the hub for our own websites.
The only way for the third party to use DeoVR's interface is following DariaDeoVR's link to the app doc and using DeoVR's own browser.
I hope my post can clarify the whole thread about the issue.