Pin Tab Greyed out in Safari after Monterey Update

After struggling with this for a while, I realize it's not a bug — it's a design decision. The left-side header icons change depending on whether you're in a saved tab group or not.

In a saved tab group, pinned tabs aren't supported, I guess since a tab group's supposed to be a bunch of tabs you've already got together for some purpose. There are also no page-back or page-forward icons in a tab group, for the same reason, I guess.

Here's where it gets really confusing.

In your unsaved tab group, the back and forward buttons and pinned tabs are available. What makes this so counterintuitive is that this is also a tab group of sorts, just waiting to be saved. I understand why Apple did this, since it's the place and way in which you construct a tab group in the first place, but yipes.

I just spent a few weeks "losing" and re-adding pinned tabs, though I realize now it was because I was within saved tab groups.

I got to wondering if it was possible to set up different toolbar arrays for individual tab groups using the Customize Toolbar... menu item. Nope, not possible.

Bottom line: If your pinned tabs are missing, get back to the top (unsaved) tab group, the one whose title is the number of tabs it contains.