Flutter Push Notificition Problem- I Needed Remote Support

I want to create futurebuilder to redirect to push notification related page in my flutter application. When directed to the relevant page, the page should be opened and the data should be loaded. My Problem is: When ı click the notificition. Data is null and application cannot directly page.

I guess it's not a very long process. I am looking for someone to help me soon

I want to solve my bug with remote connection.

ı use firebase functions api, firebase functions api create notificition but cannot routing page when ı click the push notification. Because ı had null data error on flutter, I think the problem will be solved if I turn my flutter page into future builder.