The companies behind the AV1 standard (including Apple) were investigated for a potential antitrust breach relating to the way patents for the AV1 standard are licensed.
The format is heavily patent encumbered and the patent pool is available “free as in beer” with a whole bunch of conditions that mean they’re definitely not “free as in freedom”, and that’s the part the EU had questions about… thankfully the EU shut down their investigation six months ago but at one point they were threatening Apple with a $40 billion fine - which likely put the brakes on any serious AV1 investments. You’re a lot less likely to see the maximum fine if you’re just a member of the standards body and not actually using the technology in your products.
I also wouldn’t be surprised if Apple announces a firmware update that unlocks additional hardware support AV1 encoding on every computer they’ve sold in recent years. They did that with VP9 after patent issues with that format were sorted out.
… in the mean time, do your editing work in ProRes, do your proofing work in HEVC, and accept the fact that encoding AV1 will need to be done overnight. It’s not really the end of the world. Video editors have done overnight exports for decades.