Yes. Any qualified mechanic — mobile or workshop — can legally stamp your service book and issue a digital service record, provided the work matches the manufacturer schedule and the correct parts/fluids are used. Drova stamps the book on the day and keeps a digital record against your reg forever.
What matters to most main dealers and warranty providers is evidence: the service was done to manufacturer schedule, with the right oil grade and OE-quality filters, on the correct mileage. A mobile mechanic's stamp counts the same as a high-street garage's.
If you're in a manufacturer warranty period, check the small print. Most modern warranties require manufacturer-spec parts and fluids but do not require a main-dealer service. Drova services to that standard so warranty stays intact.