The 1Password service very often puts site wrong/empty icons in password item pages.
Just copy this line below and paste it in the address of your new bookmark (CTRL+D) in your browser and save it:
javascript:open(`https://s2.googleusercontent.com/s2/favicons?sz=64&domain=${document.querySelector('.value.URL input').value}`)
After, click on this bookmark (bookmarklet) when you are on the password item page with "Edit mode" enabled.
Then a new tab will be opened with a picture of 64px in width.
It can be dragged to the tab with the password page in the 1Password service on place of the icon item.
The service will upload it to the server and you will only have to click Save
button.
The script takes the first filled Url
in the entry on the password page and opens a link in a new tab that will find an icon on the site and optimize it.
Erik Martín Jordán for the description of the universal method of getting the site icon
1Password for excellent service that keeps our secrets safe
updated 07.03.2022