ISO 45001 Hazards and opportunities

Answer:
Clause 6.1.2 is titled “Hazard identification and assessment of risks and opportunities”, and is separated into several subsections. Clause 6.1.2.1 is about hazard identification and talks about identifying the hazards present in the processes of your organization. Clause 6.1.2.2 is about assessing risks of the OH&S management system, both related to the hazards and all other risks. Clause 6.1.2.3 is about assessing opportunities of the OH&S management system. These are linked together under one clause not because there is a relationship between hazards an opportunities.
Clause 6.1.4 identifies planning activities to be put in place for clause 6.1.2.2 and 6.1.2.3. The link in this clause is due to the link of risks in clause 6.1.2.2 (against the hazards as well as the overall risks of the organization) that need to be planned for. The standar d is not saying the hazards could become an opportunity.
For a better understanding of the ISO 45001:2018 requirements, see this whitepaper: Clause-by-clause explanation of ISO 45001:2018, https://info.advisera.com/45001academy/free-download/clause-by-clause-explanation-of-iso-45001