Hello
I can't think of a specific word that would correspond to "tracking" and be used the way you describe.
These are some similar phrases we would use in Greek:
Εκπέμπουμε στο ίδιο μήκος κύματος - We are transmitting on the same wavelength.
Μιλάμε την ίδια γλώσσα - We are speaking the same language.
A much less common would be:
Οι σκέψεις μας συντονίζονται – Our thoughts are tunning.
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Vasiliki Baskou, Instructor/Director, https://learn-greek-online.com.