Almost 1 in 3 tracked spacecraft is Starlink, is that accurate?

Even more than that. Of the 35k tracked "Satellites and spacecraft", more than 12k are debris bringing Starlink to 1 in 2. If you look only at Active known satellites, around 2 in 3.

From Starlink's page on Wikipedia: "Starlink accounts for approximately 75% of all active maneuverable satellites in Earth orbit"

Probably correct. Random link from 2023 (~50%) https://www.springco.co.uk/what-do-satellite-constellations-...

Feels like being in Elon Musks open air prison looking at that swarm of starlink satellites encapsulating the earth.

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