I have a game loop that simply iterates through every entity and calls entity.update()

class Engine {
    protected entities: IUpdateable[]

    update() {
        GlobalTime.tick(this)
        for (let entity of this.entities) {
            entity.update()
        }
    }

I need to accept user input, but without requiring the game loop to pause and wait, like the following code would do

    update() {
        getUserInput() // will result in async-await like behavior, pausing until user input
        GlobalTime.tick(this)
        for (let entity of this.entities) {
            entity.update()
        }
    }

What is the standard way to implement optional asynchronous user-input with a continuous game loop? Is it just to have an .events array that is checked every frame, resets every frame, that the frontend can optionally append user input to?