The one thing that is often overlooked in this whole discussion is how developers can profit from the Mac's limited market share. While that sounds counterintuitive, and is is probably the primary barrier to having more games on the Mac, it also means that select companies like Feral, Larian, and 4A can make a profit by selling to Apple's customers. The Mac platform is a smaller pie than for PCs, but these companies can take a larger overall share of that pie, since there are far fewer competitors.
I don't slavishly pick up games just because they have a Mac version, but I do take notice when a new game is announced, and therefore investigate it further. I purchased Metro Exodus after learning it had Mac support, I probably wouldn't have considered it otherwise, and I found it to be a great game. I was already interested in Baldur's Gate 3, but Larian gets free advertising when Apple features it in a presentation, which are watched by millions of people. I own numerous Feral titles because they specifically target Mac users with quality games. I would note that OwlCat dropped Linux support for Pathfinder: Wrath of the Righteous, but continue to support a Mac version, which means that they consider the Mac to be financially viable, but not so for the Tux crowd.
The Mac will never have the same marketshare as the PC, we all know that, but companies can make a profit by selling to Mac users, since they have fewer competitors. With Boot Camp going away, that provides a clean break, with Apple Silicon being the target going forward. Mac users are never going to get the same number of titles as PCs, but the Mac's market share is large enough for a select number of companies to make a profit from, which is expanding due to the increased performance that the M-series brings, as well as the overall gains that Apple has made at the expense of a contracting PC market.