> if we are pedantic I could point out that this another R5 230.

Thanks for clarification that this is about two different Radeon R5 230 cards where one doesn't work with MorphOS 3.19 and the other may work. Nothing pedantic about that.
An RV910-based R5 230 working with 3.19 on PCIe-based G5 Mac would be splendid news as highest so far reported working card has been RV810-based HD5450, while cards reported as non-working include RV910-based HD6450.