Phoenix: Eden17

Hi no Tori: Eden no Sora

The anime follows a woman named Romi and her partner as they depart from the devastated Earth and head for a new life on the planet Eden17. However, life has already been made extinct on the new world, so Romi finds herself eking out an even harsher life there.

(Source: Anime News Network)

Note: The anime has a film version with an alternative ending titled "Hi no Tori: Eden no Hana" that released in Japan on November 3rd, 2023.