Thanks for the login credentials to Edyta Domaradzka Photography 
The reason the fonts are not preloading is actually quite simple: you set the font family and weight in custom CSS, but not through the element’s UI (apart from the theme styles for body and headings, which are preloaded perfectly fine), which is required to make this work automatically.
To prove this I just outcommented the custom CSS and added the typography settings through he UI and and preload tag shows up as expected:
You can find a similar report and explanations here:
As mentioned in the linked thread, if you want to keep the “custom CSS” route, just add the preload tags manually to the head scripts of your header to ensure that they are always preloaded.