In our wishlist there 2 customizations - sort by and options which gives a lot more choices. Have you looked at these?

Thank you for telling me about them, but they're not exactly what I was looking for. It seems like they are more for sorting my wishlist when I happen to look at it (which is not very often) as opposed to customizing when I get notified.
And while having the ability to sort by Steam Deck compatibility is present, having to search through my wishlist to try to figure out if anything has changed would likely not be something I do very often, and would rely upon me remembering it. Assuming that I could group my wishlist picks that might be useful, but I do not believe that is an option.
As well there is nothing about the various forms of DRM/usage requirements.
In addition, given the lack of any way of signaling to the game publishers, I fear that they would misinterpret my interest as meaning that I would purchase the game if they could manage to find the right price, when price is not a factor at all.

Though thank you for responding.