The 'total supply' indicates the number of coins already in circulation, supplemented with the coins that are not tradable yet. So it only applies to coins already in existence. This is different from the 'max supply', in which future coins are included. The total supply is greater than or equal to the 'circulating' supply'. It can consist of tradable and non-tradable coins, such as reserved or not yet released coins for the team or investors.
Total Supply
Total Supply Explainer Video
What is Total Supply? | Crypto Terms Explained