Can't connect to wifi

I installed home assistant on Raspberry Pi 3B+.
When I plug ethernet cable, it works correctly - I can go to ha page, login etc.

So I wanted to use Wifi insted of cable and I created file on RPI CONFIG → network → my-network, replaced SSID + pw. It’s a bit strange that if I set my-network file first and then run RPI, the CONFIG folder disappears from sd card but I assume it’s normal.

I see in logs during system startup:
(1 of 2) a start job is running for wait until kernel time sychronized ( … counting seconds … / 1min 30)

Also my IPv4 addresses are empty:

(it wasnt empty when I plugged cable)

I even reset my wifi router and set very basic router configuration to check if this is the reason, but probably not.

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