Remove unnecessary tabindex=0 on inputs because they're redundant
tabindex=0 adds an html element to the tab order. By default, inputs are already focusable, so they do not need a tabindex=0.
Note: the tabindex=0 should also be removed from any elements that do not explicitly need to be focusable via tab. Screen readers users will be able to reach the text regardless whether it is in the tab order or not. It'll likely just confused keyboard users.