Check out @higgsas’ nodes. He has a group specifically for this that works for any number of points.
The method uses a single String to Curve with the string “0123456789” and then does some math to pick the correct combination of instances to place the text. Very clever stuff that I learnt a lot from - worth checking out.
Made my own 3-digit simplified node-group that looks like this:
For more digits you just do more “floors” and add more Instance on Points. I think Higgsas’ version does way more.
Good luck!