I feel like they were, because of the previous issue back near the start of the war, before Starshield was created in 2022. But maybe some of the terminals weren't for whatever reason.

On February 8, 2023, Shotwell [SpaceX President and COO] announced that the company had taken measures to prevent the use of Starlink service to control combat drones. SpaceX restricted the licensing of Starlink communication technology to exclude direct military use of Starlink on weapon systems, such as the Ukraine use of Starlink antennas on uncrewed surface vehicles.

https://en.wikipedia.org/wiki/Starlink_in_the_Russo-Ukrainian_war

So since it was created, they've been using Starshield.