There used to be a bug with the Create Row block that prevented blocks placed within it from firing. It was described here: Create row block not working well from yesterday (Thunkable x) · Issue #699 · thunkable/thunkable-issues · GitHub. But as far as I know, that bug was fixed.
These two blocks are both useful for looping through a list:
The first block allows you to use “i” from the variables drawer so that you don’t have to manually increment its value as you’ve done above.