Anything is OK, whether on the grill or baking sheet. The placement of the tools has no effect on the roasted sweet potatoes. The key is to bake them at the appropriate temperature level in the oven, otherwise they won’t taste delicious. Which tool to use can be decided according to personal circumstances, as long as it is easy to operate, such as turning the sweet potatoes during baking, taking the sweet potatoes out of the oven, etc.
Extended information
When you bake something in a small oven, you basically just put the food in it, but medium-sized ovens usually have three levels of upper, middle and lower heights to choose from. As long as the recipe does not specifically indicate the upper and lower heat temperatures, just place the baking pan on the middle layer; if the upper heat temperature is high and the lower heat temperature is low, unless the upper and lower heat of the oven can be adjusted independently, the temperature is usually adjusted at this time. Add the temperature of the upper and lower heat and divide it by two, then place the baking pan on the upper level, but you still need to keep an eye on whether the surface is overcooked.
Reference: Baidu Encyclopedia-Household Electric Oven