Zelda/tetra in WW isn't a sage, she is a decendant of the zelda from OOT a decendant of the famus seventh sage from OOT,but not a sage.
In WW we have only two sages, the earth and the wind sage, a diferent kind of sages that the OOT sages.

Farore is asosiated with Forest/Earth(kokiri race)/Wind
Nayru is assosiated with Water(zora race)/Love
Din is assosiated with Fire(Goron race)



Also the WW sages and the OOT sages are diferent kind of sages.

-The function of the OOT sages is basically watch over hyrule, take care of hyrule

-The function of WW sages is only awake the power of the master sowrd, the sword to repeal evil, the sword that can stop ganon evil plans.

In WW We have two sages from The two races that was linked with the godesses:

-Fado(kokiri)/Farore
-Laruto(Zora)/Nayru

But we only have two sages, any goron(the race lnked with Din) is a sage in WW.

4 awaked the power of the master sword we only nedded two sages, the only sages that exists in WW.

Also in WW,Zelda/Tetra never was awakened as a sage.