I worked at QNX twice as a softwarte engineering intern during my college days in 2019 and 2021 on their OS security features and testing. Can say it was an unforgettable experience and I learned a lot there. The senior devs there are amazing.
Is there an effort to get this stuff out under a license people would recognize and be comfortable with? Asking because the question came up almost a year ago and it sounded like you were going to look into it.