I’m doing my own service too, but the shop has to verify your work and then document the work with Husqvarna. Also, the only way to turn off the service indicator is via the Husqvarna diagnostic computer.
I took photos of the oil change, and documented all the measurements etc required for the service. Then I took the bike to the shop and showed them the docs. They charged me a few bucks for the time to reset the indicator.