I just pirchased and install my new deco Simple instalation,love it But how can i manage the network remotely? If i disconnect my wifi, i can not see the network from my apps My experience with other

hi, I plan to try TPlink DECO E4 for my sister house, it is 4(and half) floor house my experience is using ruijie Ew1200 and Tenda nova MW3 i want to try different router just to enable my knowledge m