Simple and secret

Hello,
As I understand it, the terms 'Pesht', 'Remez', and 'Daresh' do not refer to different levels, but rather to different learning methods and approaches. Thus, both the Nefarious and the Remez are 'in our world', but they use different forms of interpretation of the verse.
In contrast, it seems that the 'Sod' deals with a different level of reality. It deals with a different world (but it is not a different method of study). This can be explained in light of the assumption of some of the Poskim and Kabbalists that there can be no contradiction between 'Sod' and 'Negala', since in fact these are two parallel worlds. In any case, it seems that 'Sod' is a world parallel to the three methods of 'Pasht', 'Remez' and 'Daresh'. These three deal with 'Negala', while 'Sod' deals with a different world.
So: a) Can it be said that in the secret itself there is a division of 'Pasht Remez and Darsh'? I think so. b) Why is the secret diagnosed together with the 'Pasht Remez and Darsh' as ​​if there is another category, in addition to which there is also a secret? On the surface there are only three options, but they themselves are divided into 'Nagla' and 'Neser'?
I would love for you to enlighten me on the simplicity of things…