Only if you can pass that value to the PHP code. I don’t know anything about the builder you’re using so I can’t answer that.
Normally in php I would do something like this to only show a specific row.
<?php if( have_rows('veranstaltung_treffpunkt') ): ?>
<?php while( have_rows('veranstaltung_treffpunkt') ): the_row(); ?>
<?php
if (get_sub_field('some-field') == $passed_value)) {
// vars
$value = get_sub_field('what3words');
$str2 = ltrim($value, '/');
}
?>
<a>">/// <?php echo $str2; ?></a>
<?php endwhile; reset_rows(); ?>
<?php endif; ?>
