[Assaf Stone] The only alignment among stakeholders that is required is that they respect the product owner’s decisions.

The product owner’s job is to maximize the value of the product that results from the work of the scrum team(s).

Making stakeholders happy is nice, but optional.

Ultimately, I’d advise to keep true to the product goal, communicate the goal clearly to the stakeholders.

This is why a product has one and only one product owner. The stakeholders do NOT own the product; the PO does.

As scrum master, I’d make sure that everyone is clear on this.

[Venkatram Boreda] Understand the Root Causes: I would start by having one-on-one conversations with the Product Owner to understand the specific challenges they are facing. This could include identifying the sources of conflict and the stakeholders involved.
Facilitate Communication: I would facilitate a meeting or workshop involving the Product Owner and the relevant stakeholders. This meeting could be used to openly discuss the conflicting work items, priorities, and expectations. The goal is to encourage open communication and collaboration.
Define Clear Priorities: It's crucial to ensure that priorities are well-defined and agreed upon by all stakeholders. This may involve revisiting the product backlog and refining it to reflect the most important items.

Coach the Product Owner: If the Product Owner is struggling with aligning stakeholders, I would provide coaching and support. This might include helping them improve their communication skills, negotiation abilities, or stakeholder management techniques.

All together it’s part of Agile, we try to implement, but fail and again we a try it and get success.

[Shekhar Chandana] Firstly, if this is the situation, it means either PO himself shared the issue that there is an issue and he is not able to bring alignment across stakeholders - Then try experimenting or may be start with the prioritisation techniques or start by allocating business value for each requirement

Check for few sprints if it works and then review and refine

If this issue is brought by someone other than PO, check where the actual problem is and start with Empiricism