That's what it looks like. Another article quotes the Voyager project manager [0]:

> "The Deep Space Network used the highest-power transmitter to send the command (the 100-kw S-band uplink from the Canberra site) and timed it to be sent during the best conditions during the antenna tracking pass in order to maximize possible receipt of the command by the spacecraft," Voyager project manager Suzanne Dodd told AFP.

[0] https://phys.org/news/2023-08-nasa-voyager-interstellar-shou...