Please add a monthly donation button to auto pay registration

We would love to add an option for our families to donate with their monthly tuition. Basically, when they set up autopay they would indicate that they would like to add a $5 or $10 monthly donation to their tuition. I feel like DSP should have this option, but haven’t found it yet. I found Grow Pro which allows you to set up a fundraiser page for a specific thing, but that isn’t what we are looking for.