Specifically, in the conflict interactions of 155 mixed-sex couples, we (1) investigated whether greater momentary expressions of the target (self-reported vs. observed) were associated with more empathic accuracy in the perceiver; (2) whether this outcome was similar for the expression of thoughts versus feelings; and (3) whether the expression-leading-to-accuracy link was moderated by the perceived threat level of these thoughts and feelings. The data revealed that greater (self-reported and observed) expression of the target’s thoughts and feelings was associated with better empathic accuracy by the partner; that this association was similar for thoughts and feelings; and that this link was not moderated by the perceived threat level of these thoughts and feelings. These findings confirm a fundamental assumption of couples therapy and have important implications for therapeutic interventions.

https://www.researchgate.net/publication/350722789_Expressing_thoughts_and_feelings_leads_to_greater_empathic_accuracy_during_relationship_conflict

So it seems that the better you express your feelings and worries, the more your partner can understand you. It's a good support evidence that focusing on improving emotional disclosure and understanding as ways to reduce relationship distress should be in the focus of couple therapy.

It doesn't support TRP idea about "keeping the frame" and "not talking about your relationships/feelings" with your partner though. And the idea is really simple. You won't be understood, if you don't express your distress clearly.