How to customize the suggested item name in the auto-save prompt?

Hello.

When a user saves a new login on our site (e.g. app.acme.io), the "Save in 1Password" prompt defaults to a name derived from the domain so we get "Acme" instead of "acme.io". It doesn't match our brand.

We've already done what compatible-website-design recommends:

brand-name <title>, application-name, apple-mobile-web-app-title, og:site_name, manifest.webmanifest (name / short_name), correct autocomplete attributes. None of these influence the suggested name.

Questions:

1. Is there a client-side mechanism (meta tag, well-known endpoint, JSON-LD…) we're missing to declare our brand name for the auto-save prompt?

2. If not, what's the official process to submit a domain + brand name + logo to 1password Rich Icons / website database?

Thanks.