I created accents in most fonts (regular not pro version)and produced them on my Shapeoko. I noticed that some of the fonts will not give lower case. I was able to produce accents in all fonts but… I noticed that you need the bit to be small enough to produce the characters since I do not have pro, I cannot v-carve in Easel so I used 1/16 flat endmill. In Cinzel, I could not produce the letter properly because the serif is very pronounced so I increased the size from 2in to 3 in and it came out properly (last letter in each row). So we know it works, the question is why does it not work for you, maybe it is your keyboard, my keyboard is set to produce the accents. You could try generating the accents through the character and symbol viewer.
EDIT: I forgot to write an important point: It appears that several fonts do not appear to have lower case letters. You original post indicates a lower case é since Cinzel is one of those letters that does not appear to have lower case, the lower case letters with or witout accent will not appear. In my case, if I type in lower case, Easel will replace will the same letter in upper case.