Thanks to Joe Mooring for his solution to my question as to how to do this.

I’ve decided to ditch Google Analytics and am evaluating using GoatCounter with Hugo with Ananke theme.

This was the layout of the site:

.
├── archetypes
├── content
│   └── posts
├── go.mod
├── go.sum
├── hugo.toml
├── layouts
├── public
└── static

This is the structure (of layouts) with the necessary changes:

.
├── archetypes
├── content
│   └── posts
├── go.mod
├── go.sum
├── hugo.toml
├── layouts
│   ├── _default
│   │   └── baseof.html
│   └── partials
│       └── analytics.html
├── public
└── static

I copied /layouts/_default/baseof.html from the gohugo-ananke-theme repo into my site’s|repo’s /layouts/_default/baseof.html.