Tillis should also be benefiting from ACB's SCOTUS nomination as a previous poll published a week ago showed that 46 % of North Carolinians want ACB to be confirmed while 33 % don't. Cunningham, of course doesn't want Barret confirmed and so I think a confirmation will help mobilize social conservative voters in NC in favor of Tillis like in 2018 in states like TN, IN, MO, ND and FL with Kavanaugh's confirmation.
Kavanagh increased partisanship in 2018, which in turn helped Republicans, hence why they gained Democrat held seats in deep red territory while Democrats gained in states you would expect to lean towards them in that sort of national environment. The issue is right now, the national environment looks really bad for Rs, and it seems like Biden is a favorite in NC, so if anything I would argue this is a wash at best for Tillis.