During sprint planning the product owner wants the team to prioritize and deliver a number...

Encourage the product owner and team to reprioritize the features and select ones which can be delivered without any dependencies

Encourage the team to continue with the current plan, do what they can. and carry forward the work not done to the next iteration

Ensure the team captures the technical dependencies as issues within the backlog and prioritize based on value optimization

Ensure that the required subject matter experts (SMEs) are engaged by the product owner to help with backlog prioritization