Can we create custom Java scripts in Email Templates in Oracle CX Sales Classic?

Summary:

I must replace the comma with a new line character for a CX Sales String field that I used in the Email Template.

Example: String str = "PRODUCT1, PRODUCT2, PRODUCT3"

The result I need in the Email Template would be

1. PRODUCT1
2. PRODUCT2
3. PRODUCT3

I tried the below in the Source code HTML format of the Email Template, but it doesn't work.

<div>{{[$FieldAPIName$].replaceAll('.','' \n ')}}</div>

Content (please ensure you mask any confidential information):

Version (include the version you are using, if applicable):

Oracle Fusion Cloud Applications24D 

Code Snippet (add any code snippets that support your topic, if applicable):