You can buy these affordable low profile (3-wheel) casters that are used to move furniture, plop one of the wheels on it and just lift the other end of the (folded) bike and move the bike easily. Otherwise its super awkward.
https://www.amazon.com/9299-6-Inch-Tri-Dolly-200-lb-Capacity/dp/B00004YOKC/ref=sr\_1\_6?dchild=1&keywords=furniture+moving+casters&qid=1626032704&sr=8-6