Accessing Content: Path field within views_view_unformatted TWIG template
You access the fields from the entity. That are not the fields from the view. And in the entity there is no field path.

Look for the path in the row content. This is a good advice not only for the path, but for all fields, because in the entity the field values are the raw data from the database and not formatted for output. That doesn't make a difference for the id and the title though, because they are plain alphanumeric, but you really should do it for more complex fields. And for computed fields like path you have no other choice, if you don't want to compute the field again yourself.