As long as the major part of Mac users only have a low end GPU in their machine, which is what the M1s have, there won't happen much on the gaming market. It is better than we had before, yes, but the gaming field has also moved along, so we're still at the low end, and ports of older games that would run good on these machines, likely don't sell much, hence they don't come either.
At least we have Geforce Now at this point, which is kind of revolutionizing Mac gaming, and likely also the only thing we have going forward. There are practically no AAA ports coming at the moment.