Creating a drop-down list through shiny, using atomic vector

Hi, welcome!

There is nothing wrong with the code you have shared so the problem must lay in the interaction of the code with your specific data (Key_Risks) but you have not shared a sample with us so, to help us help you, could you please prepare a reproducible example (reprex) illustrating your issue? Please have a look at these resources, to see how to create one for a shiny app