Meta Quest violates the GPL and does not respect user freedom.
By Contrast CNLohr's Wireless Vive with an Orange Pi (libsurvive #13)[1]
can respect your freedom, so I plan to make a clone. I started using designing 
my own hardware for lighthouse 2.0 tracking based on Lighthouse FPGA [2]
using KiCad, starting with a breakout board for the TS4231[3] from Triad Semiconductor.
This IC is used in the Valve Index, a VR headset which works with Monado[4] even on
OpenPOWER systems such as the Talos II[5] and Blackbird. After testing the breakout board,
I plan to make a PMOD which uses the same geometry as the Lighthouse positioning deck.
I have several FPGA boards including OrangeCrab[7] and BeagleWire[8] that work with libre
toolchains including yosys and nextpnr. As a host interface I plan to use the RP2040[9].

[1] https://www.yewtu.be/watch?v=azyt_Vt96bg
[2] https://codeberg.org/LibreVR/lighthouse-fpga
[3] https://www.digikey.de/de/products/detail/triad-semiconductor-inc/TS4231/12718618
[4] https://monado.dev/
[5] https://www.raptorcs.com/
[6] https://www.bitcraze.io/products/lighthouse-positioning-deck/
[7] https://orangecrab-fpga.github.io/orangecrab-hardware/
[8] https://beaglewire.github.io/Blogs/Getting_BBB_Ready_for_BeagleWire.html
[9] https://www.raspberrypi.com/documentation/microcontrollers/rp2040.html