You need to look at PPP-adjusted per-capita stats, and also accept that there are limitations in a simple measure of "health outcomes" (e.g. average life expectancy)
https://ourworldindata.org/grapher/life-expectancy-vs-health...
What you can see though, is a cluster that vaguely fits "spend more, better life expectancy", with two outliers:
1. The USA, massively outspending every other country, but having same life expectancy as China spending a tenth of what it does
2. South Africa, spending roughly as much as Mexico or Columbia, but 10 years less life expectancy. I suspect it needs more targeted spending with its HIV crisis, rather than measuring average spend vs average life expectancy