No, it's using the same letter at the start of some/all of the words in a sentence.
Not really,
What you said is true, but what I said is true-er.
It's the sound
Because in a case like this,
Fat Farts frollick in Phones.
The PH would be included too, since it is a similar sound, YET, not the same letters.
Enough grammar arguements, BECK on topic.