Why I can't change the character set and collation for field, table and database?

Apply OS: macOS

Apply Navicat Product: Navicat for MySQL, Navicat for MariaDB, Navicat Premium

Apply Navicat Version No.: All

Please control-click the connection and choose Connection Properties/Edit Connection. In General/Advanced tab, enable Use MySQL character set or choose Auto from the Encoding drop-down menu.