Plugin installed, pattern created, not seeing "insert pattern" icon/option on post

[brokkr]

Version: 1.0.0
WordPress: 5.4.1
PHP: 7.4
Webserver: Nginx
Install: Multisite

I have activated the plugin network-wide and have access the Block Patterns in the in left-side admin list/menu on each of my sites. On two of those I have created a pattern in the pattern builder and then gone on to create a new post. On both sites I fail to see any option to insert patterns.

Judging by the screenshots on the plugin page I feel I should be on the lookout for a masonry-gallery-style icon. I can't see any such icon and having gone through every single menu in the editor I have failed to find any other mention of patterns.

Disabling all other plugins than Block Pattern Builder makes no difference.

Am I looking for the wrong thing or is it for some reason missing?

EDIT: Went ahead and disabled Jetpack as well. Made no difference.

[justintadlock]

The Gutenberg plugin has changed the location of the pattern inserter. It is now merged with the normal block insert (+ button on the top left of the editor). It's under the Patterns tab of the inserter.

I'll get the screenshots updated in the next revision.

[brokkr]

OK. Strangely, though, I'm still not finding anything.

Clicking on the block insert '+', I get the usual fold out headers / tabs: Most used, Common, Formatting, Layout, Widgets, Embeds, Jetpack ones, and finally Reusable. Entering 'pattern' into the search field, yields nothing. Both of my patterns have the word 'pattern' in the name so I would expect them to show up. I haven't found them under any of the other headers, either.

As I've said the plugin is definitely installed and activated as witnessed by my recent creation of a new pattern and the presence of the Block Patterns entry in the admin menu. Let me know if there's anything I can do to test.

EDIT: Checked the Block Manager to see if anything had been disabled. All blocks installed are enabled and I don't see any patterns there either.