In the sense that the Constitution is above the law, yes.
The president is not obligated with protecting elections so that should not fall within absolute immunity. At best, the president appoints election-related officials and may pressure them to do something about an election, But acting unilaterally is not something a president is supposed to do. (In my opinion)
Edit: Having now read the syllabus and opinions a couple times, Roberts has stated what I have. It's up to judicial review to determine if what he's done is within his core duties or peripheral duties.
I'm super confident this guy will be found guilty of election interference. When is a much bigger unknown.