Interesting tidbit on Aleksandar's blog about network fixes:
https://aplus.rs/2020/opencore-network-audio/
He mentions swapping the network card to make it "act and work as native Apple hardware" albeit, you revert back down a version of WiFi and BT. Not a new concept in hackintoshing I know, but some specific peices of hardware and his steps are clearly documented for anyone with this specific motherboard who are interested in exploring other options. He goes through two methods:
1) using Broadcom BCM94360CD card with an adapter and a riser for seamless out-of-the-box function - I'm not sure how he physically routes the riser and antennae once it is mounted in the case, but it should produce a cleaner look compared to the sharkfin antenna that comes with the motherboard
2) getting older Broadcom chips that are physically identical and programming functionality with kexts and the like
He also gives a nod towards people creating kexts to get the stock card working. These were probably not completed when he did his build and posted it.
Intriguing to say the least, he doesn't mention specifically what does and doesn't work, but when discussing option 2, he talks about Apple Watch unlock not really working although it says otherwise, which makes me believe he got pretty far.