Reyee RAP6260G not available when I try to add it mesh with RAP6262G(master)?

I bought a new rap6260g outdoor antenna and wanted to add mesh with rap6262g(master device), they are on the same network, very close to each other , good quality power, what is the solution please?

Hello！
1.First we can check the country code
2.You can try to set the channel of the main device to the front channel
3.What to do if the search for pairing fails
(1) Check whether the ad hoc network neighbors have discovered new devices and manually add and merge them;
(2) Switch to wired pairing method