The letter grade in Canvas is in a very small font in the upper right hand corner of the gradebook. It can be easy for students to not see it while the student's percent grade is very easy to see. I suggest that the letter grade be visible in the same size font and same location everywhere the percent grade is shown.
This issue creates undo stress for students who don't see it. For example, a student may see their percent grade and think they failed the course but based on potential curving done for the final grade calculation, the letter grade may have been a passing grade but the student doesn't immediately see this.