Indeed, she's a cruiser! I have balance issues and rode trikes 5 years; I rode over 4 thousand miles in 2018 on a Schwinn Meridian. My average speed was 9 MPH, but I removed the chain wheel and replaced it with a 60t. Increased to 71 gear inches; still a mid gear ratio but my average speed went up to 15 MPH. Back then I was commuting 32 miles a day, so it reduced my commute time an hour.
In 2019 I assembled a Kent Monterey Trike with a seven speed free wheel. The single speed had a 22 tooth freewheel but this one: 28, 24, 22, 20, 18, 16, 14. With the 60t crankset I'd max at 111 gear inches for 17 MPH (faster downhill and wind on my back). Last month I started riding an Electra Townie 7D (not an electric model). Put balance wheels on, and with the 44t OEM crankset, I've achieved speeds like riding the Monterey. I just raised the balance wheels to the second level and my balance has improved over the past month.