[1][2] In 2021, Dewi won silver at the XX National Sports Week, losing to Saifi Rizka Nurhidayah at the final, making her the first badminton medalist from Bali since the inception of the event.

[4] In late April, Dewi competed at the Asian Championships in Muntinlupa, Philippines, but had to lose in the second round from 1st seed and eventual finalist Japanese player Akane Yamaguchi.

[9] In late April, Dewi competed at the Asian Championships in Dubai, United Arab Emirates, but had to lose in the second round from her senior teammate Gregoria Mariska Tunjung.

[14] In early August, Dewi competed at the Australian Open, but had to lose in the second round from 8th seed Japanese player Aya Ohori in straight games.

[15] In September, Dewi competed at the Indonesia Masters Super 100 I but lost at the semi-finals from fellow Indonesian player Ester Nurumi Tri Wardoyo in rubber games.