Ask HN: Job market for SDMs/Engineering Managers. Any reliable data?

I’m trying to find reliable data on the job market for Software Development Managers/Engineering Managers.

It’s easy to find broad tech hiring reports, but hard to break the data down by role, company type, location, or tech stack.

Anecdotally, it looks worse than the market for SDEs. Many companies are flattening management structures. Managers are taking on more teams and more direct reports. Coinbase is the extreme example.

Does anyone know of good datasets, job-board analyses, or reports that track this?

I wonder if I should go back to IC or maybe I should become Software Agent Manager ;)