There are a few ways to get more symbols in Illustrator. One way is to go to the Window menu and choose Symbols. This will open the Symbols dialog box, where you can find and select the symbol you want. Another way is to use the Symbol dialog box.
You can find this dialog box by going to the Window menu and choosing Symbol. The Symbol dialog box has a search bar at the top, so you can easily find the symbol you want. To add a symbol to your file, click on the symbol in the Symbol dialog box and then click the Add to Symbol button.