Donation Block: change default option selected

To change default option selected in Donation Block, from this.

To another option, for example $50, like this.

You can use this code to Page Header Injection (page where you use Donation Block)

<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.1/jquery.min.js"></script>
<script>
$(document).ready(function() {
    $('.donation-form .option input[value="5000"]').prop('checked', true);
    $('.sqs-cover-the-fees-checkbox').prop('checked', true);
});
</script>

Remember to update this.