It's a great site, with a beautiful layout, and impressive design, however, I tiny oversight appearance on the filter by Region input bar, the first option of filter region does not appear when out of focus, a solution to solving this, could be by removing the place handler text from the select element and adding another option element with the value of the empty string, the option should be the default option, example from code is given below:
<option selected value=' ' style={{ color: `${colorValue?`${BlackColor}`:`${WhiteColor}`} `, background:`${colorValue?`${WhiteColor}`:`${BlackColor}`} ` }}>Filter by Region -All</option>and its empty value search option could be the "all countries" value in your filter algorithm , great work you have , welldone