The depth in vectric vcarve will be controlled by the space in the font allowing the bit to drive down to its depth.

So closing the fonts 2 walls down will limit the bits depth. Also changing the angle of the bit can have it hot the walls sooner a d limit the depth...

To do what you are thinking, you should have/use a centerline, or a stick font, then do an engrave to depth with a v bit...

We can look at adjusting your font to do what you want.

I'll look at the first file you posted...

We need the text you want and the dimensions of the bit you will use...