This is posted in the Focus 3 subcategory of the VIVE Technical Support sub forum of the VIVE Community forum. Welcome to niche street, in niche city, in niche county, in niche state, in niche country, on niche planet. I'll be your guide to requesting basic functionality for our face brick portals to digital alternative dimensions.
The Focus 3 has had its Eye and Face tracker out since last October. VRCFT also reached version V5 in April. Again, it won't matter when the VIVE Self Trackers and the Eye and Face Tracker for the XR Elite come out later this year. A huge chunk of standalone use is for PCVR, and PCVR use is a major feature for both the Focus 3 and XR Elite. PCVR means loads of control schemes and freedom of use and expression. Here's a nice link on HTC's website championing features like PC VR use and Space Calibrator, which allows business to continue to use the Steam VR equipment they already bought from HTC. https://blog.vive.com/us/introducing-new-features-vive-focus-3/
Even if the camera tracked products and lighthouse products cannot talk directly to each other, they should at least get out of one another's way. HTC sells ALL of them don't they? Not only that, but upcoming commercial products like the Diver-X contact glove are going to support both the Steam VR tracking AND the VIVE Self Tracker while most likely still emulating the Index control/finger tracking software. https://www.kickstarter.com/projects/diver-x/contact-glove/posts/3777038
That, and Steam VR by itself does not care whether or not you have any controllers turned on. That's HTC VIVE, VIVE Pro, VIVE Cosmos w/ Steam VR tracker (?), VIVE Pro 2, and Index users without a problem. Possibly Pimax users as well, other than all their other problems. If I had any experience with Oculus or WMR products, I might be able to list them too.