No data replicating in Fiori Apps

Dear Experts,

After Fiori Configuration steps in both Frond End Gateway System and Backend System, I see only Fiori Apps in Frond End system but I don't find any data that is replicating here from the Backend system.

I tried to open the purschase order number "A1223" of backend system from Front End Fiori Apps. I get the message "No Data". See the screenshot in attachment.

Any ideas, please? Am I missing anything in configuration steps?

Thanks & best regards,

Sreenu