How to count completed tasks on canvas column

I have a table with projects, and a Canvas column that contains some tasks as checkboxes. On the projects table, I want to be able to look into the canvas column and simply count the number of checkboxes that are complete.

I’ve tried having a table on the canvas column as it’s easier to acheive this, but i would need a different table for each row on the project table.

Hi Gareth

I have given an example here: