Yes, you get quite a wide selection of optional modules to choose from, and you can take modules from other departments as well if you get permission.
As an example if you look at year 2:
https://warwick.ac.uk/fac/sci/dcs/teaching/courses/cse2-2425There's one compulsory module on analogue electronics, then you can choose 2 modules from the optional modules list, eg AI or a language.
You can also choose modules that are completely irrelevant if you acquire permission--chemistry, biology, philosophy, whatever. These are "unusual options" which may also include CS modules as well, eg in 4th year there is an optional CS module Computational Biology which is unavailable for CSE students, but you could still apply to take it as an unusual option.
There are modules like 'Mathematics for Computer Scientists 2' which you are not permitted to take because the content is similar to modules that you already do/have done/will done. Engineering Mathematics in Y1 CSE already covers the entirety of content of MfCS2 in Y2 CS for example.