I have two major issues with Send an Email (v2).
1. It does not add all the dynamic content you think it would. It does not allow me to select properties from Variables nor does it allow me to select properties from When an item is created (SharePoint action). The older Send an Email action does show this type of dynamic content.
2. If I use an expression and freehand type values from earlier steps (i.e. freehand code into the expression box what dynamic content would normaly give me)...that doesn't work either. In my Flow, I "initialized a variable" then I used the Send an Email (V2) action immediately after and typed into the body of my HTML email < a href="https://myCompanyonline.sharepoint.com/sites/MyNewSite/Lists/PowerAppsTestList/EditForm.aspx?variables('varCurrentItem')&pa=1&e">Link to Item</a>. I received an error upon saving instructing me to initialize my variable first...which I had already done in the previous step.
Bill K