Yes. In the Digambar tradition (Das Lakṣaṇa-parva), many devotees choose to fast completely on the first and the last day of the 10-day period. But practices can vary: some people fast only partially (e.g., one meal a day) or follow different levels of restraint on different days. The important idea is to undertake some form of austerity during Das Lakṣaṇa-parva, with many opting for the strongest form on the first and last days. Always follow what is suitable for your health and guidance from your local Jain teachers. You can read more here