To harmonize with international standards Canada has announced revisions to banned objects on flights. No mention of whether the US plans to follow suit.
https://globalnews.ca/news/3852229/transport-canada-flights-knives-allowed/


Transport Canada says knife blades up to six centimetres (2.3") — about the size of a large paper clip — will be allowed on domestc and most international flights. Blades of any length will continue to be banned on U.S. flights while razor blades and box cutters of any size will remain prohibited on all flights. Another change will prohibit certain powders and granular material with a volume of 350 millilitres — the size of a soda can — or more.")