Wouldn't U.S. assistance during WWI, WWII, NORAD, Afghanistan, the 1917 Halifax Explosion, the 2008 financial crisis, the 2016 Fort McMurray Wildfires, the COVID-19 pandemic, and other instances of disaster relief count as gestures of friendship?
https://en.wikipedia.org/wiki/Canada%E2%80%93United_States_r...
"The United States has no closer and no more important friend than Canada ... And when we work together, as the closest of friends should, we only make each other stronger."
https://bidenwhitehouse.archives.gov/briefing-room/speeches-...