Thanks for this important question.
Now, when looking at the Code please note that we need to look at the 1981 recommendations and all the subsequent relevant WHA Resolutions;
There is excellent guidance on the Code and the Inappropriate marketing of foods for infants and young child feeding: https://www.who.int/nutrition/topics/guidance-inappropriate-food-promotion-iyc/en/
I strongly recommend you and all of us gets familiar with it. All Member States have endorsed this guidance.
So, the question you raised may have different answers according to:
a. what products?
b. do the products that you intend to use comply with the Code requirements as well as the Guide I just share?
b. what brands?
c. what ages?
d. why using a commercial product? why not a fresh/locally available in the market?
if as you say the fresh ones are not available? but will the mothers be able to access what you use in the demonstration?
and more more questions ...before I even attempt to answer...your question
In general the Code does not cover complementary foods ....but covers the way they are marketed and promoted.
Please also note that the IYCF-E Ops Guidance (2017) provides clear recommendations on complementary feeding during emergencies, in case there is a plan to provide such support to families
The general principle please is really to look at all the implications of our actions, even when well motivated
Happy to discuss farther
Best
Alex