At that age I wouldn’t focus on phonics, but instead on phonemic awareness. Then you can introduce phonics in a few months. Basically kid needs to learn to deconstruct the stream of speech into component sounds. Kids with dyslexia have a core deficit in this area. It can be really fun to do, so not a huge lift. Start by identifying words in a sentence or phrase. Then work on syllables - play with them. Tap it out, dance, hop. Then start pulling apart sounds in a word. Not letters, but sounds. Hat has 3 sounds, but eight has 2. Don’t even look at letters yet. Then start playing with the sounds - have kid replace first sound with another sound. All of this can be play. If you look up phoneme awareness and the name Kilptrick you’ll find good material.
Then phonics, which is the explicit teaching of how each of those speech sounds is represented with a symbol and linking them together. But you need to be able to really hear the sounds first, and a kid with phonemic deficits needs a lot of extra practice. Lots. They should do phonics in K and 1st, but most schools aren’t laying the groundwork with phonemic awareness first.