I use a redox wireless, the layouts in both the ergodox and the redox are completely customisable, CTRL is a separate key from the Z by default on mine for example.

https://configure.ergodox-ez.com/ergodox-ez/layouts/default/...

That is the default for the ergodox ez, as you can see there are multiple ways to access the CTRL key.

Via right ctrl: On the right side, / is ctrl. Hit / twice to type /.

Holding / on the right side and hitting z gets the equivalent of Ctrl+Z.