yes, it works thanks.
And I got rid of Google warning: “Ensure text remains visible during webfont load”.
function cstm_add_font_display_property($css)
{
return str_replace('@font-face{', '@font-face{font-display:swap;', $css);
}
add_filter( 'autoptimize_css_after_minify', 'cstm_add_font_display_property', 10, 1 );