There is a new alternative p2p mesh wireless in town, and suprisingly it was introduced by IEEE Wi-Fi Alliance rival 3GPP. It's the very first non-cellular standard for 5G namely DECT NR+ [1]. Since it's backward compatible with DECT it will be very supportive of real-time traffic for voice.
[1] What is DECT-2020 New Radio (NR), and how big a deal is it? (2021)