See im graphing each digit of pi where x= witch digit it is and y= its value but desmos dose not want to calculate digits beyond the 15 or 16 digit.

This is a limitation of javascript, not desmos per se.

You might be able to take a different approach. I’m sure you can find the first 1000 (or however many) digits on a website that you could copy and paste into a table. Then you could plot the values from the table.