Why I can't block someone with this blue icon via cloud, what does that blue symbol mean, that's not me, I'm not even in that place

I have Archer C80 as the main router and RE200 range extender, internet plan is 50Mbps When I connect to Archer C80 I only get 33-39 on both 2.4GHz and 5GHz, but when get connected to RE200 I get 45-4

It's been several days since I've been unable to connect to my cloud-compatible devices (archer c80, re200 re305) from a different network, even when I'm on location but connected to mobile data I can

I can not access my router in other place via cloud since yesterday, but my router seems to be fine because my ip cam which is connected to the router works just fine

I have a plan to buy either Archer AX10 or Archer AX23, but I'm confused why AX10 which is only 2.4GHz n300 has wider wifi range than AX23 with 2.4GHz ax574? https://www.tp-link.com/en/compare/?typeId

You may have heard that TP-Link embraces an updated EasyMesh protocol that allows building a multiple-AP mesh network with certified products from various vendors. It also breaks new ground in the net