Pretty clear trend: low-trust societies have low gdp and high-trust societies have high gdp, regardless of resource distribution. Africa/South America are resource rich, japan/iceland are resource poor.
I can easily conjure a scenario where high per-capita GDP makes trusting easier (either because there’s enough to go around and/or because there are reliable police/judicial sanctions for violating trust) than in a hardscrabble low per-capita GDP society with lower (insufficient?) lawfulness.
Yemen and the US are equal shades on that trust polling map. That alone should show you it's not really a factor.
India has a higher GDP and GDP per capita than it's neighbor Pakistan, but Pakistan has quite a higher trust score on your map than India.
There are many more examples, just these jumped out at me.