@decadthelena I see where the problem is now. Since the control references are in an array, you’ll need to do a forEach() loop on the array to show or hide the control.
export function btn2_click(event) {
optionOne.forEach((item) => {item.hide()});
optionThree.forEach((item) => {item.hide()});
optionTwo.forEach((item) => {item.show()});
}