Googls sheets API mapping issue with wp

ive built a google sheets api, thats authenticated, and is able to post automatically from a google sheets db to my wordpress website,

ive managed to map the title, excerpt, image attributes, but not others which are theme based and custom field based.

I have built the sheets database that has all of this, and have files , json, css, php all done

can you with correcting the script, and help with the mapping?