Any updates? Please let me know if you have any questions. We must clarify this issue ASAP.
Q1) Yes, it is.
Q2) "to change encryption function" in the question is not clear.
However, SHE is enabled in this MPN "S6J32LELSMSC20000", according to the S6J3200 Series datasheet
Figure 2-3: Option and Part Number for S6J320E
So, you can use the function in SHE. Please refer to the S6J32XX Series Hardware Manual Platform Part
CHAPTER 26: Secure Hardware Extension (SHE)
Q3) Generally, it would depend on your customer. if you would like to discuss this topic more, we suggest you to contact Cypress sales representative and/or FAE team.
Thank you for your reply.