It's an official image for the new episode of this anime.

https://www.animenewsnetwork.com/interest/2022-03-28/konomi-kohara-jokingly-demands-kaguya-sama-creator-give-chika-a-romance-subplot/.184110

I guess they liked Airi Suzuki when she sung background for S2...

https://www.animenewsnetwork.com/news/2022-03-18/masayuki-suzuki-suu-airi-suzuki-perform-kaguya-sama-love-is-war-anime-season-3-theme-songs/.183755