Safari 14 recently launched and started putting favicon back in the tabs, alongside the webpage's name. When you open too many tabs (as I may be wont to do...) the page name is dropped and the tab only shows the favicon.
Safari preferences has the option of showing the favicon or not. While deselecting this option does mean narrow tabs retain the webpage name, it also removes the favicon from the tab.
Is there any behind the scenes way to either
a) show both the favicon and webpage name when the tab is wide, but show only the name when it is narrow or
b) change the width at which only the favicon is shown (currently the tab has plenty of room for a word or two if the favicon wasn't centered)?