Running those adblockers on your devices is extremely insecure. They register as a VPN and intercept HTTPS traffic. They decrypt the encrypted traffic, filter it, and encrypt again meaning all your communications are signed by this single app’s certificate. Not to mention any vulnerability would wreak havoc.

https://grapheneos.org/faq#ad-blocking-apps

Yeah the protocols are there, portals support it, OBS works. It is great that random applications cannot capture the framebuffer.