I'm sorry but I really don't have anything else to add here.
You can either wait, for as long as needed, and try to forget about it for the time being, or pay a lawyer and see what your options are, and whether you're ready for them. It's up to you, really.
I have a family member in the same situation your wife is facing (single applicant) with a similar timeline. It's frustrating but they're sitting tight, it will come when it comes, and they're not ready to spend significant money for what will highly likely happen in 2025, and extremely likely will happen before the end of 2026, and will then last for (hopefully!) decades. Most people in my immediate entourage got their citizenship in less than a year, but some had to wait for 2 years and a half or 3 years, that's the reality of it.
Your wife, and by extension and choice the rest of your family, is one of the "unlucky" ones, and of the hundred of thousands of citizenship applicants, probably tens of thousands are equally as unlucky. Its just how the system works. Maybe it brings you relief to know that there is no reason to think there's an issue with your wife's application per se, or no more issues than the applications of many many people, or maybe it doesn't, but again, it's what it is. Good luck!