Well the problem is that you are looking at the wrong file 😛
You have done everything correctly for the “icons.woff” but you haven’t done rel="preload" for the “icons.ttf” file.
This appears to be referenced in your main.css file.
Now as woff font format has very good support you may decide to remove the reference to the ttf format (which would probably be my recommendation as the browsers that don’t support woff don’t support ttf anyway except very old android devices (less than version 4.4)), if not just add a preload for the ttf file in the same way.
<link rel="preload" href="https://www.budowle.pl/fonts/icons.ttf?myrw8" as="font" type="font/ttf" crossorigin>
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