Many thanks @billyjoebob999 @Hedda
I’ve updated the firmware this evening using the video guide (via Windows) to CC1352P2_CC2652P_launchpad_coordinator_20211217. I’ve also checked my 2.4ghz Wifi channel which is on channel 1 and there’s no other detectable WiFi from neighbours etc on any other channel when using a wifi scanner app on my phone. Despite all that there’s no improvement unfortunately. I’ve tried re-pairing one of the sensors whilst sitting it right next to the dongle and it’s still not being detected and with the one device I do still have connected if I move it more than a couple of metres away it becomes unavailable. I’ve also tried an alternative wireless screw on aerial just in case there’s a fault with the one supplied but that didn’t improve things either so I’m becoming more and more convinced there’s some kind of hardware issue going on here.
Is there an easy way I can test the dongle and connectivity to a sensor from my Windows laptop so I can be in a completely different part of the house, just in case it is something to do with it’s current location?