How you approach and invite people to your iterate workshop is super important. For some stakeholders, it may be the first time they're seeing your solution.
Consider creating showcases of your solution or trailers that summarise the problem, process, and solution. It helps bring it to life for people who need clarity on what you've done and why.
Reach out to some of the people you spoke to in discovery. By now, they should have had time to interact with your solution and will have great feedback and insights about how the solution has solved the problem for them.
Check the measures you set up at the beginning of the project and collect quantitative data. You need to be able to prove your solution is working and validate this against what your audience is saying about it.
Play this insight back to stakeholders during the iterate workshop. If the solution isn't working as intended, you can consider how you'll communicate this to the group and the potential reasons why.
A good iterate workshop will show off the solution, get stuck into the impact measures and data, and gather any further input you need for any subsequent stages.
End with some recommendations for where to go next. Did you achieve what you set out to accomplish? What actions are left, and who will take them? What could you do to make the solution even better in the future?
You may have to fight to get the time to run an iterate workshop, as once a solution is live, the business will want to move on to the next exciting thing.
If you position these as showcases with a chance to show off some killer business impacts you've had, then you may get a higher attendance rate with more senior stakeholder groups. If your solution has worked, you'll have plenty of people wanting to claim they're part of it, so use this to your advantage!