I just asked Dd (5 ) what the letter L says and she just stuck her tongue behind her front teeth and said LLL There was no vowel, but to write it I think Uhl seems to sound the closest rather than Luh.
I was taught to read very quickly at age four, we didn't know our letters at all, we learned the alphabet by the letter sounds not the name and were all reading in no time. So we said in rote form, ah buh cu du eh etc etc. Then we connected the sound to the visual letter. and could read, the name of the letter came later and we could spell and read really well.
I think learning letter names first confuses kids, that darn alphabet song is a pain
I didn't learn that till I was about 10. I tried to teach Dd sounds first, but she seemed to get both at the same time and is reading alone and writing me stories now and starts K in July.