How to get new Automator action, that executes an Apple Script, to show as an option in Apple Photos "Services" Menu?

Update: I may have found success.

The closest I can get so far is, upon clicking "File > New" in Automator, to choose "Quick Action" which brings up some choice that looks similar to, though not exactly like, the script creator's screen shot. And this seems to at least finally get my script to show under "Photos > Services" from within the Photos app. See screen shots below.

... I have selected photos and clicked to run the script, and as I was, at the time, selecting photos inside a slideshow, and could not tell if anything was happening, I went out to the main view, selected ALL photos, and ran the script again, and this time I noticed (1) my file names seem to show as titles, (2) there is a spinning "gear cog" icon in my top Macbook menu bar. I think this means the script is churning through my entire collection of images, perhaps twice! I chose to select them all because the "unnamed" (as in untitled) images in the slideshow were from various years and I had no idea where in my collection of photos they might be spread or showing.

The instructions say, in the main part,

Create an Automator action, that executes an Apple Script to change the titles to the filename, if the title is empty:

• Launch Automator, create a new service, and drag a "Run Apple Script" action into the workflow.

• Copy and paste the text below into the "Run Apple Script" action to replace the default text in the action.

While I'm in Automator, whenever I click "File > New" there is no choice to create a new "Service" — and the closest I can find to match the directions is the choice of "Workflow" which is at least mentioned in the directions. Below is what I see on "File > New"