Looking at the output you shared, your field is named annualRevenue while you’re trying to get the value for estimatedAnnualRevenue. Can you please make sure that the field names are same?
Also, can you share the workflow? A dummy workflow with the similar result might also work.
I can just repeat that what @harshil1712 wrote sounds to 100% correct to me. The following ones should work perfectly looking at the screenshot you did post: