iPod Nano stuck 'loading' in Finder for Ventura 13.3.1

I have an 2017 iMac Ventura 13.3.1, Music 1.3.4.56, a 4th Gen iPod Nano (model MB754LL). My goal is to put some music on the iPod to play it in my car (which lacks Bluetooth).

Initially, the iPod did not appeared in Finder's sidebar (even after: restarting it & the iMac; toggling sidebar contents in Finder's Settings; and Restoring the iPod using Disk Utility).

I did successfully Erase the iPod using Disk Utility (Mac OS Extended Journaled format).

Now the iPod's Disk partition appears in Finder (yeah!), but when I click the the iPod's other 'Music' partition*, Finder gets stuck showing "Software: Loading..." and nothing ever happens. It never successfully loads the iPod data (such as the General, Music, ... and other tabs, nor the Restore or Sync buttons.)

Any suggestions how to get the iPod to fully load in Finder? Or maybe there's a workaround to put music into a specific folder in the (working) Disk partition and have it work anew?

[I'm not sure how to think of what's going on inside the iPod. Maybe the iPod 'OS' piece isn't restored by Disk Util and it needs to be re-loaded somehow. But I'm likely wrong about what's going on. Ignorance is bliss. But only sometimes.]

* I'm not sure what to call the two entries from a single iPod that appear in Finder's sidebar. I always think of them as the Disk part and the Music part (since I only use Music media in my many old iPods).