Hello, I'm ediiting a flow in which i have a select:

chunk(body('Select_2'),length(body('Select_Headers')))
json(concat('{"__metadata":{"type":"SP.Data.', replace(outputs('settings')['listName'], ' ', '_x0020'), 'ListItem"},' , replace( replace( join(item(),',') , '{' , '') , '}' ,'') ,'}' ))
And generates me this output:

What i want to achieve is that if the column name starts with an _x00, add at the beggining an OData_, but cant figure how to do it, could someone please give me a hand?
Thanks!