KONOSUBA - An Explosion on This Wonderful World! is listed for 12 episodes according to BD/DVD listings : r/anime

Anime Phantasm

KONOSUBA Art Style Comparisons: S1 vs Explosion (Ep 12) : r/anime

KONOSUBA: An Explosion on This Wonderful World! New PV : r/anime

Why are there no long anime series nowadays? Why do they only go to episode 13? - Quora

KONOSUBA: An Explosion on This Wonderful World! New PV : r/anime

KONOSUBA Art Style Comparisons: S1 vs Explosion (Ep 12) : r/anime

KONOSUBA (SEASON 1&2 + An Explosion on This Wonderful World!) ~ English Dubbed ~ $57.19 - PicClick AU

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Konosuba: An Explosion on This Wonderful World! (TV Series 2023) - IMDb

Konosuba: God's Blessing on This Wonderful World! (TV Series 2016–2023) - IMDb

Konosuba: An Explosion on This Wonderful World! Bonus Story (Light Novel): Konosuba: An Explosion on This Wonderful World!, Bonus Story, Vol. 2 (Light Novel): Deadbeat Busters (Paperback)