searchform.php

<form role="search" method="get" id="searchform" class="searchform" action="<?php echo home_url( '/' ); ?>">
    <label for="s" class="screen-reader-text"><?php _e('Search for:','startertheme'); ?></label>
    <input type="search" id="s" name="s" value="" />

    <button type="submit" id="searchsubmit" ><i class="fas fa-search"></i></button>
</form>