Help: Replacing a Leviton Dimmable switch with a Regular Switch
Here is how &quot;old-school&quot; 3-way wiring works.   Black is always-hot, white is neutral.

Here is how 4-way wiring works.

Note how the 4-way switch changes very little about the wiring.  This second diagram shows that the wiring sequence could vary.
Your smart-switches are using the wiring in a completely different way.  You will need to figure out how to reallocate the wires to find 2 &quot;travelers&quot;.
Of course your wires are not yellow. There are no color codes for 3-way wiring. Certain wires must be certain colors because of Code requirements; the travelers get the wires that are left.  I am extremely fond of re-marking them yellow using a pack of multi-color electrical tape... but they don't get that way by themselves.