Thanks for the replies. What do you think about this: https://www.rei.com/product/892482/cannondale-synapse-alloy-5-105-disc-bike-2017 Weight and price are perfect, but I'm not knowledgeable enough on components to know if it is suitable for touring. Thanks.
This is an aluminum frame with a little carbon that is common for advertised entry level racing bikes. Gearing is lowered to appeal to recreational riders, and price is on low end for this frame and components. Personally, I'd go with a randonneuring bike, touring bike for lightweight touring, more room for wide tires, including room for fenders, etc. It is not too hard for a steel bike to come in at 21 lb.