Ventura 13.2.1 - wifi dropping on MBP and Mini

I've got a 2018 MBP and a late 2018 Mac Mini both fully updated to 13.2.1 and both recently intermittently dropping wifi. To the extent that they won't see any wifi networks at all.

The old trick of turning the wifi off and back on works temporarily. I have to go as far as

forgetting the wifi network altogether and rejoining to gain a stable connection.

Other wifi clients in the house are unaffected, even multiple iOS devices.

The router in use is fully up to date on firmware and OS. I've checked router logs and there's no LAN IP conflicts.

The issue seems to be isolated to the two MacOS devices and only since 13.2.1.

I have tried to perform wifi diagnostics on the MBP but as the wifi is constantly dropping there's nothing conclusive but I had the report files saved.

Coupled to this I've also performed some of the common wifi network troubleshooting steps.

• forgotten network and reconnected
• deleted wifi interface from settings and rebuilt
• deleted .plist files from SystemConfig folder
• reset the NVRAM
• Created a second wifi network in the router to only have the MBP and Mac Mini use that
• Turned off Airplay
• Not turned off Bluetooth as some sites suggest as that's not possible due to input peripherals being bluetooth
• Ruled out WLAN issues due to all other wifi clients on the WLAN being unaffected, including iOS devices