Welcome in the fascinating world of PSoCs!
In the datasheet the component is named "LCD_Char" while you named it just "LCD". The selected name is always prepended to the _API() to give you the possibility to instanciate two components (Whatever you choose) and distinguish which you want to address with the API.
Also keep in mind when you place a component on schematic, with it
unselected, rigjht clik, pick "Find example project" and you can add to
your workspace an example use of the component (with code) or open in
a new workspace. Either way you can then cut and paste code into your
project. Fast way of getting stuff to work.