EAP245v3 is a new hardware version of EAP245 serial products. It just be shipped recently. Maybe you can ask the local agent or local TP-Link staffs to check if your country have EAP245v3.

I think you are using EAP225 in standalone mode, you can go to Monitoring->Client->User list to check for the Active time of wireless Clients.

You can refer to this forun post : https://community.tp-link.com/en/business/forum/topic/150177?replyId=300727

EAP will broadcast UDP packets (discovery packets) to 29810 port in same subnet. If Controller receive the discovery packets, then Controller will show this EAP in pending list. If Controller and EAP...

Do these two EAP belong to same subnet? You can use your phone to ping the IP address of these Sonos Speaker to check if your phone can communicate with these speaker.

What's the model of these Google devices? You need to make sure if they support 5G radio. Maybe you can try to connect with 5G radio of other AP/Router, check if these Google devices can work with...