Is it getting harder to develop desktop apps as desktop environments diverge further away from one another?

Note: This is not a wayland vs xorg debate, but rather curious how to overcome some app development challenges in wayland.

I was thinking what would it take if I want to contribute to a project like YomiNinja to make it work in wayland? Have a look at the 1 minute video in the project page to get some context.

I can’t rely on xdotool in wayland and I can’t rely only on wlroots since KWin and Mutter don’t use it, so it seems like I’ll have to code for different APIs to support KWin, Mutter, and wlroots. For example, on KDE I’ll probably have to use the KWin scripting API to get the active window, the cursor position, etc. then I’ll have to figure out how to do the same thing in Mutter and wlroots.

XDG Desktop Portal seems like a perfect fit here but there seems to be some resistance for asking for these kind of "portals", here is an example of a request "Add a portal to see currently open windows" that's been open since 2019, from reading the messages there it seems to be 2 recurring concerns that is holding this back:

1. Security concerns: I think it’s better to respect end-users by giving them the choice to allow or deny permissions in a prompt rather than resisting to add the portal which completely removes the choice from the user
2. If this portal is relevant for a flatpak app: Portals are useful even without using flatpak since it's a way for app developers to avoid writing desktop-specific code

In the absence of Xorg’s APIs as a common denominator it feels like desktop environments are going to continue to diverge. Desktop environments might have their own implementation and API for each “missing” wayland protocol. This makes it more important for having XDG Desktop Portal be more than just a flatpak tool that's just developed for flatpak relevant use cases.

The easier it is to make apps for desktop linux for all kinds of use cases (time tracking, assisstive tech, OCR, etc.) the more people and companies will use it which hopefully increase investments in improving linux.

What's the community's opinion on this?