Apple watch series 4 don’t see walkie talkie app

I just buy a apple watch series 4. I updated up AWOS 5.1.2. But My watch dont see walkie talkie app.

Throught I installed Facetime on my IPhone X. And restarted my watch too

please help me.

Info my watch:

-model: A1977

MU6J2LL/A

-seri: FH*****DH9

-WOS: 5.1.2(16s46)

my email: *****

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