@KostasPap 

In going off what @Archerc  mentioned, if you turn on the router before 7am do the Wi-Fi turn on? What happens if you don't turn off the router at all does the schedule run? Maybe temporarily run an hour apart to test.

Thank you both for the answers.

If the router stays on, yes, wifi schedule function works as intended.

It seems there is a simple "trigger" On Off code line that justs executes at the specific time you set.

This means if you power off router during Wifi Off time and power on after Wifi On time router misses the "trigger" (cron job?) command and stays in state Wifi was before power out.

So even if router is power on during Wifi On time, Wifi stays Off.

@Tony  maybe a small code should be running during power on router (during cold boot) that after setting the time (Ntp sync) must check the state of Wifi radios if Wifi Schedule is set.

If "curent time" >= "Wifi On time" Wifi should be turned On.

A simpler approach is after boot ("power on" not "soft reboot") Wifi radios should be always turned On.

I believe it is more crucial to have Wifi access after a power failure.

@Tony 
Thank you. Archer AX50 is one of the best routers i ever had.
Tp Link has one of the best router support team i had to contact with.