It’s most likely not. Doctors in Cuba self-report aggregate statistics and are penalized if they underperform. That tells you all you need to know.

https://www.econlib.org/about-that-cuban-life-expectancy/

Independent studies have shown giant anomalies in other metrics that suggest the favorable metrics are being fudged:

https://mobile.twitter.com/wwwojtekk/status/1233017228792082...

Also a lot of reports that women are pressured to get late term abortions if there are any potential issues observed with the fetus, as this will ensure it doesn’t count as a mortality and not hurt that clinic’s stats.