This short KBA provides some key links related to RF coexistence recommendations with WF200, WFM200 and WGM160P.
WF(M)200 implements a PTA arbiter which allows to improve the RF coexistence with another 2.4GHz device. This is very useful when the product is small with co-located antenna. The following link provides an application note on this topic: https://docs.silabs.com/wifi/wf200/content-source/application-note/wifi-coexistence
Even when implementing managed coexistence with PTA mechanism, you should take care to unmanaged coexistence principles : https://docs.silabs.com/wifi/wf200/content-source/application-note/wifi-coexistence#unmanaged-coexistence
Off course, the 2.4GHz coexistence is a sharing and so the throughput and/or packet delay could be impacted for both or for one device. It will be difficult to target high throughput and short delay with two or more devices sharing the 2.4 GHz. If you target moderate Wi-Fi throughput like 10 or 15 Mbps then the sharing should be easy. If you target low Wi-Fi throughput then may be the PTA is not always useful but the interface could be connected for future usage in case of need.
We recommend to add Test Points on used PTA signals to debug and check the configuration on both devices is Ok.
Note with EFR32 using BLE or Zigbee, only the 3 wires PTA interface is currently available but the 4 wires could be connected for future usage. You could refer to these Application Notes below :
A general learning-center Wi-Fi coexistence page: