Short answer: Research suggests yes. Controlled studies report that MDMA can increase emotional empathy for positive expressions like happiness, while effects on cognitive empathy are smaller. Some work also finds reduced sensitivity to negative cues such as fear or anger.
These effects appear short lived and context dependent. They can vary by dose, individual differences, and expectations, and they are often measured in lab tasks after a single administration, so results may not generalize to all situations.
For a concise overview, see a recent meta-analysis summarizing MDMA’s effects on empathy: https://pubmed.ncbi.nlm.nih.gov/41315485/. Hope this helps.