What he said^^^^. There is no valid reason to use a scan tool for what is nothing more than a simple oil change (that really shouldn't be necessary in this day and age, cars dropped those early first services ages ago). Harley has encouraged dealers to hook up every bike that comes in for service, for various reasons including to verify warranty compliance. But it is not and never has been a requirement in the official maintenance lists. Do it yourself if you really want everything checked, otherwise you will be paying through the nose for a simple fluid change and nothing more. Keep receipts and document the date and mileage you performed the service. Make a copy of the checklist and use that for documentation, annotate it with the results of the inspections, tests, and adjustments. Sign and date it, attach all relevant receipts, and store it in your records. I've been doing that with all my vehicles for decades, if nothing else it gives you real data you can refer back to when any questions come up.
One suggestion, check your VIN online for any recalls or special service notices. That is something connecting to the Harley system can do, but you can also do it yourself on their website.
Jery