Most touch pads are still clickable there just isn't a separate button like there used to be. Another possible option is to double tap on the touch pad in order to click.

On mine, you just hold down corner for a long press to right click, short press or tap for normal click.

I'm looking to replace my (aging) laptop. But the ones I see on-line no longer have a left and right click button I have on my current laptop and which I'm used to on the mouse (mice) I have always used. Is there a commonly designated substitute?

No Left or Right click on a touch pad?