That's interesting because at my workplace, employees over 40ish tend to use their work issued cell phone as their only phone. including all their personal contacts, email, photos, social media, etc.

And almost all employees under 40 have 2 separate devices, one personal and one work.

I don't work for the state though.

This is incorrect. Instagram stories and reels (the only Instagram features that actually reach anyone now with their current algorithm) cannot be created and posted from desktop.

Also, when you know 99% or your end users will be on mobile, you should always check what your work looks like on mobile, even when you can post from desktop.