But it is a very tedious workaround and it only works a few weeks :
There is no bottom/up order button on the URI list to move it to the top. You have to copy manually remove and then recreate an entry.
Most websites do not have an alternative domain name. And finding one that match is tedious to say the least. Furthermore as they are obscure subdomain mainly that works, it is only working for a few days, weeks. So even when you find a solution it is not lasting more than a few weeks.
I can still not provide THE icon of the website, as very often alternatives are a bit different icons.
I can share my experience that reproduce itself more than tens of time: after looking each subdomain with the workaround above the only working one is looking like https://charts-dev-2.camelcamelcamel.com/ (Note: this one is not working, it is for example) which works after a tedious search. But 2 weeks after it is no longer working. Why ? because these are usually dev and integration subdomains. What I also had very often is subdomain for partnership or marketing purpose that finally had a working favicons, but they also have a limited timespan as well unfortunately.