The Oscillator Sound has a Reset parameter, but that parameter doesn't work at audio rate. If it did I could see how you could make a hard syncing oscillators by linking one Oscillator into the Reset of another.
Without an audio rate Reset, how can you hard sync two oscillators?
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I've just noticed Cristian asked the same question a while ago:
https://kyma.symbolicsound.com/qa/2839/how-reset-phase-hard-sync-oscillator-with-another-oscillator?show=2839#q2839
I think this is a question worth reviving, though.