Found this that clarifies:
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https://www.missionjuno.swri.edu/news/nasas-juno-mission-getting-closer-to-jupiters-moon-io
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“Juno has been orbiting Jupiter for more than 2,505 Earth days and flown over 510 million miles (820 million kilometers).
The spacecraft arrived at Jupiter on July 4, 2016.
The first science flyby occurred 53 days later,
and the spacecraft continued with that orbital period
until its flyby of Ganymede on June 7, 2021,
which reduced its orbital period to 43 days.
The Europa flyby on Sept. 29, 2022,
reduced the orbital period to 38 days.
After the next two Io flybys, on May 16 and July 31,
Juno’s orbital period will remain fixed at 32 days.”
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They are talking about spacecraft Juno’s orbit around Jupiter,
not Ganymede’s orbit.
Juno’s speed really picked up after zooming thru those moon’s respective gravity wells.
At first glance, it looks like it got splattered with space bird poop.