Q.Sweet Potato Vine
The botanical name is Parra De Camotes (tricolor). Does it require a trellis? It says it only grows to about 6″ in height. I’d like to trellis it and train it to grow upwards. Will this work?

Sweet Potato Vine will not grab unto a trellis, but you could gently tie or use horticulture twists to attach it to a trellis is you wished to try it.
It is generally grown as an annual in patio pots or window boxes for a trailing effect in containers.
https://www.gardeningknowhow.com/edible/vegetables/sweet-potato/grow-sweet-potato-plant.htm