Here is a link to Article 19 of the USMCA. The cybersecurity provision is in Paragraph 15, quoted below.

https://ustr.gov/sites/default/files/files/agreements/FTA/USMCA/19%20Digital%20Trade.pdf

Article 19.15: Cybersecurity
1. The Parties recognize that threats to cybersecurity undermine confidence in digital trade. Accordingly, the Parties shall endeavor to:
(a) build the capabilities of their national entities responsible for cybersecurity incident response; and
(b) strengthen existing collaboration mechanisms for cooperating to identify and mitigate malicious intrusions or dissemination of malicious code that affect electronic networks and use those mechanisms to swiftly address cybersecurity incidents, as well as the sharing of information for awareness and best practices.
2. Given the evolving nature of cybersecurity threats, the Parties recognize that risk-based approaches may be more effective than prescriptive regulation in addressing those threats. Accordingly, each Party shall endeavor to employ, and encourage enterprises within its jurisdiction to use, risk-based approaches that rely on consensus-based standards and risk management best practices to identify and protect against cybersecurity risks and to detect, respond to, and recover from cybersecurity events.