Hi @VidhyaAk1
I believe you'll need to have developers to generate the nonce server-side and from there embed it in the HTML in a way so that it can be accessed by JavaScript, so that you can pick it up in an data element. e.g.
<meta name="csp-nonce" content="<generated-nonce>">
Then from the data element you can pass it in as an mbox parameter.