Did you try an internet browser search?  I found a 2017 response to this same question, there should be a UV template in your product library.  A follow-up comment states that the Gen 8 template is similar to the Gen 3.  SnowSultan used to provide many figures UV/Seam guide templates and that can be found here:

SnowSultan - Seam Guides (artstation.com)