Hello there!
I'll try to help out with some of your questions.
Custom Name for SMEs in Email
- This should be inside an apply to each. The names should be stored somewhere (SP list for example). Inside the apply to each, you can use the column that stores the SME name. Provide more details if needed 🙂
Custom Date for Review Deadline
Yes, there is! Try out "addDays(DATE VARIABLE,14,'MM-dd-yyyy')". Replace DATE VARIABLE with your variable.
Link for more details - https://www.spguides.com/power-automate-add-days-to-date/
Hyperlinking "Item Name" in Email
For this, my suggestion is to use HTML formatting. If the link as always the same, you could user hyperlink.

Try something like this, go for Code View, and place "<a href="LINKTOITEM CONTENT BOX">View item</a>" Note, when toggled (Code View) it can't be untoggled 🙂
Reference - https://powerusers.microsoft.com/t5/General-Power-Automate/how-to-put-clickable-link-into-email/td-p/561491
Error Handling with Multiple SMEs
How are you placing the email to? Are is the source data? There seems to be a problem in the way the email to is being placed. Provide more details 🙂
Hope it helped!