Welcome to Retromags, @BlitzFitness!
There's no single, easy-to-check way to learn exactly what our scanners have on hand, but I can give a few pointers.
First, the Magazine Database section has an option for editors to set issues to "Scanning" status. Most scanners will do this for the next several issues in their queue just so people know what's coming or so two different people don't work on the same issue independently. In the case of PSM, you can see that, right now, issues 13, 16, 17, 28, 29, etc... are currently marked as "Scanning", so sooner rather than later, they should be popping up. But since I recently sent 38 PSM issues to @MigJmz, the database hasn't been updated to account for those yet, so there's more than meets the eye in many places; just because it says "Missing" doesn't mean we don't have it. Issues 14, 19, 22, 25, 26, 27, 30, 31, 33, 34, 35, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 53, 54, 56, 60, 62, 64, 65, 66, 68, 69, 70, 71, 72, 97, and Code Book 2000 were in the haul I sent, so there's plenty of PSM goodness still to come.
The second way is to check the forums. Some members, like @E-Day, keep a "Work in Progress" thread they update periodically to show what's coming down the pipeline. As you can see from that thread, he's got his hands full with a ton of EGM's. We received an absolutely monstrous donation of mags back in 2019, and they all wound up on E-Day's front porch. I'm not entirely sure he knows everything that showed up in that haul, but as you can see it's kept him busy for over two years already.
The third way is to do what you did here, and make a new thread or ask in the ShoutBox. Late-era PSMs (and early-era PlayStation: The Official Magazine issues) seem to be fairly hard to come by these days, so I'd be surprised if we had more than a handful awaiting digitization. Donations are always welcome, but everybody always has a lot on their plates, so I'll let them work out how best to proceed. Thanks so much for becoming a member, and for the generous offer! I hope your stay here is as exciting as it can be! If you have any more questions, don't hesitate to ask.