That's one good thing with the later cameras, like the 1DX Mark II. You can see if you are in One shot or Servo AF already in the viewfinder.
It also gives you a visual confirmation, with the AF point(s) used, that focusing is completed. No beeps needed.
The 1DX doesn't give you this indication with the AF point you are using directly during normal shooting in daylight. You have to either look at the green blob below the viewfinder, or the AF symbol in the lower right of the viewfinder.
However, it does allow you to change the AF point illumination setting from AUTO (illuminate when it's dark) to ON (always illuminate). Then you get the same brief red flash of the AF point when focusing is confirmed as the 1DX Mark II does, just not as bright. It may be difficult to see in sunlight. As the points are always illuminated in the 1DX Mark II, it instead has a brightness setting for the illumination. Hence you can make it bright enough to see in good sunlight too.
Well, there's yet another trick, but it takes that you have stored a home point in the camera and aren't using that point for focusing. Until focusing has been confirmed, the HP will keep on flashing in the viewfinder, to let you know where it is. But once focusing is completed, it disappears.
I know they cost a lot, but the 1DX cameras aren't only about speed and weight. They give you a lot of options too.