as you might have guessed, this works here just fine.
but maybe you want to create a duplicator package and installer.php using this
https://wordpress.org/plugins/duplicator/

then put it somewhere where i can download it and i see what i can find if i do this with a clone of your site here

>do you think this might have an impact on the email sent?
no. this is only css for your frontend and has no effect emails/print templates

>is there any chance i can add a css code somewhere
no, because it has zero to do with css . you cannot somehow show something with css that isn’t there in the first place

>oh ok, so what u need is basically a complete copy of my website ?
ideally i don’t get/need anything from you and you do this yourself as below (DEBUG:) and most certainly the preferred option
but if you want me to track down your particular issue in your particular setup , than – obviously – i need whatever you have there . i cannot guess what your setup/plugins etc etc are

DEBUG – as always really:
have you disabled all other (non-wppizza) plugins, used a default theme and enabled debug ?
i.e followed all of this
https://docs.wp-pizza.com/troubleshooting/

after that
if you still get the same issue in that scenario, then you can send me a clone of the site only with wppizza plugins (or whatever else there is ) in effect to slim it down to as far as you can where it still produces the problem you are having and i can have a look

believe me, i neither want to nor need to look at other stuff or have any interest in what you are doing in particular – that’s your business. Neither do I have any interest in your userdata or order volumes/users or any of that – if that’s what you are worried about for some reason …

All I care about is fixing things for people if they have issues they cannot figure out themselves so i can move on to other things.
Furthermore, there is of course always the possibility that i have overlooked things in certain scenarios, so being able to figure out and consider issues that may appear in certain setups will of course allow me to take those things into consideration for the future and all those instances.

As I’m sure you are aware , there are tens of thousands of plugins and themes , i cannot possibly test all combinations

so, just to make sure i’m not missing things, i installed clean/new version of wordpress, wppizza , wppizzza post/zipcode and sofort here on a test server, made a test order and the zip/postcode is shown in the emails as intended…
do you have any custom filers/actions running on your site ? if so, have you disabled them to see if it solves the issue ?
(again, I’m just trying to narrow down the issue)