I'm not findind a way to mesh these devices together.  I'm coming from Asus devices, the AX11000 and the AX92u(I Think) which allowed me to extend four network ports in any room I wanted.  I no longer have the ASUS devices and have the tp-link ax11000 and I just purchase the AX21 to onemesh to it.  I'm not seeing a way to do this.  Am I missing something?  Can you only use the "range" extender devices to connect to OneMesh?  

Thanks in advance,

~M