The non-appearance of Affinity Publisher (Mac version) is indeed really frustrating, but so too is Affinity's silence. Adobe InDesign is a wonderful program but for occasional users it's far too expensive – at getting on for £20 per month it's outrageous for anyone who's not actually earning a living from it.
What everyone is looking for is a publishing app that we can buy outright, and not at Adobe prices. If it costs £100-£150, though, so be it. (Although low prices attract far more 'let's gove it a try, there's not a lot to lose' customers.)
If Affinity is close to admitting defeat on this, I think we'd all rather know. This isn't fair.