macOS blocks tools like Espanso from viewing or modifying login input fields.

I wonder if SikuliX may be of interest to you, then. I just invoke KeePassXC's built-in autotyper; it's not too much more painful for me. Anyway, thanks for sharing! We certainly use it for very different things. Here's a Reddit search URL generation script that I use sporadically:

  - trigger: '`rs'
    replace: '{{output}}'
    vars:
      - name: form
        type: form
        params:
          layout: |
            [[subdomain]]
            Subreddit (optional): [[subreddit]]
            Query:
            [[query]]
          fields:
            subdomain:
              type: choice
              values:
                - www
                - old
              default: old
      - name: output
        type: script
        params:
          args:
            - python
            - -c
            - |
              if '{{form.subreddit}}':
                print(f'https://{{form.subdomain}}.reddit.com/r/{{form.subreddit}}/search?q={{form.query}}&restrict_sr=on&include_over_18=on')
              else:
                print(f'https://{{form.subdomain}}.reddit.com/search?q={{form.query}}&include_over_18=on')

I wanna make a Lemmy equivalent of this, eventually...

Update: Okay, just did for my instance!

  - trigger: "`lemmy"
    propagate_case: true
    replace: "https://programming.dev/search?q=%7B%7Blemmy.query%7D%7D&type=%7B%7Blemmy.search%7D%7D&listingType=All&page=1&sort=%7B%7Blemmy.timeframe%7D%7D"
    vars:
      - name: "lemmy"
        type: form
        params:
          layout: |
            Query: [[query]]
            Filter: [[search]]Time Frame: [[timeframe]]
          fields:
            query:
            search:
              type: list
              values:
                - All
                - Comments
                - Communities
                - Posts
                - Users
                - URL
              default: All
            timeframe:
              type: list
              values:
                - TopWeek
                - TopMonth
                - TopThreeMonths
                - TopSixMonths
                - TopNineMonths
                - TopYear
                - TopAll
              default: TopAll

It'd be nice to be able to improve the layout's appearance, but I don't know how to do that...