Short answer: generally no. In Jainism, root vegetables and tubers are avoided because pulling them from the ground harms small living beings. Sweet potato is a root/tuber, so it is usually not allowed in both Digambar and Shwetambar traditions.

• Why: The traditional rule against root vegetables aims to minimize harm to tiny organisms in the soil and to avoid consuming underground plant structures.
• Traditions: Both major Jain sects (Digambar and Shwetambar) follow the principle of avoiding root vegetables, though practices can vary by family or regional tradition.
• Practical note: Many practicing Jains substitute with non-root vegetables (e.g., leafy greens, fruits, legumes that are not tubers) and with grains, dairy (where permissible), and cooked preparations that adhere to their local observances.

If you’d like, I can point you to a Jain Knowledge page that discusses food rules for Jain households.