Is there a Laird Connectivity Wifi modules supporting 4ADDR mode and layer2 bridging?

Yes, Laird´s 60-radio supports 4-addr mode and layer-2 bridging with Lairds specialized Summit stack for Wifi.

This functionality requires the use of software version (Gihub) or newer and Lairds Summit Software stack for the 60-series modules: /wireless-modules/wifi-modules-bluetooth/su…

This is supported on all 60-radios including SU60-SIPT, SU60-2230-C, SOM60 and SOM8M+