In Stellaris, you can refer to where the Stellaris Shipyard is as follows: In the main page of Stellaris New Ship, after entering the planet main page, you can also find the new ship option on the right side. As shown in the picture, click on the new ship Click on the page to select the battleship to build. After preparing the information, you can build the battleship. Click to select the battleship that needs to be built. This is OK.
The Star Dock is in the main interface of the game. After entering the galaxy main interface, you can find the Dock option on the right, as shown in the picture.
Then click to select the ship to be built in the dock list. After preparing the materials, you can build the ship. Click to select the ship to be built and it will be ok.