You are not missing anything.
Nothing externally to lubricate.
However repacking wheel bearings would be something to be done that involves grease. This would entail removing the tire & wheel assy. Then removing the hub assembly. Cleaning out the old grease from the hub and bearings. Then install new grease, inspect the brakes, install new seals and re-assemble
Not sure of the interval to repack wheel bearings on a 2021 model. And the owner's manual will give you guidance on that. In fact reviewing the Air Stream owners manual would be far more productive than greasing shackles.
1966 Mercury Park Lane 4 DR Breezeway 410 4V, C-6, 2.80 - Streamless.
1966 Lincoln 4 door Convertible 462 4V 1971 Ford LTD Convertible 429 4V Phoenix ~ Yeah it's hot however it's a dry heat!