Hmm, you’re right–and looking at the post to which I linked earlier, it says that simplepbr handles HDR, but doesn’t mention bloom, in fact.
So fair enough, and my mistake!
In which case, while it may be more, well, complex, it might be worth looking at complexpbr, which from what I see does support bloom. (A bloom effect is visible in certain screenshots, and the example code includes demonstration of how to set it up.)