Change the currency symbol

To change the currency symbol on the front-end you can use the hook apply_filters( ‘babe_currency_symbol’, $currency_symbol, $currency_code )

Change the currency symbol

add_filter( 'babe_currency_symbol', 'customtheme_currency_symbol', 10, 2 );
function customtheme_currency_symbol( 
     string $currency_symbol, 
     string $currency_code 
): string
{
     if ( $currency_code === 'USD' ){
         $currency_symbol = 'USD';
     }
     return $currency_symbol;
}