You can try mine. Made it myself. Have never come across a Ford based spreadsheet. They used to publish a scheduled maintenance listing but no longer.
My timelines for scheduling is a little compressed from Ford's recommended intervals. Mostly to pair up maintenance tasks. Also the base numbers are for a 2006 18k Lbs. chassis but I think they should be OK to support a 2015. 65,000 miles and no problems. Last oil analysis for both the engine and transmission came back with no remarkable metals counts found.
https://drive.google.com/file/d/1wnb...ew?usp=sharing
The generator is a Guardian Quietpact 40G also.