I made jerboa like a month ago, and I'm not an android dev; I had to learn android programming from scratch.
Its not that any of these mobile apps have taken a back seat; I wouldn't have made making a native android one a priority if I didn't think mobile apps are important.
The issue is that even though all of these are open source projects, very few experienced coders contribute to them, so I welcome your effort to find more development help. All of the ppl currently working on lemmy, its web app, and its mobile apps are spread very thin.
Even with that said, I'm very proud of all the work put in by these devs, and I have no doubt they will continue to improve their apps, but on their own schedule. If you want things done faster, the codebase is right there.