The number of available channels depends on whether you are using 20/40/80MHz channel width. Use 20 or 40. And you may need to ask your neighbour to reduce their channel width to be more considerate...

@Hank21 This is NOT a reassuring response from TPLink. 1. If it is incompatible with Omada 4 then Omada 4 should not have done an automated update or even allowed a manual update. 2. Your support...

My Omada Controller automatically updated one of my three EAP225-Outdoor V1 APs to firmware v5.0.7 yesterday and it resulted in continual disconnects and reconnects. I was only able to resolve this...