Hangeul Warrior Aiya

Educational series
–Year: 2021-2026
–Year in film: 2020s ? 
–Country: South Korea 
–Who in bibs: girl ~7-9 ?, lady
–Available on DVD: yes ?     
–I own: no 
–Bib occurrence: low ?
–Rating:  3/10 ?
–Rating: ***
–Comment: A young girl in longer shortalls and a lady in this or related series.

Korean title: 한글용사 아이야 . Aka Hangeul Heroes A.I.Y.A. Is this the same series? No entry on IMDb.

Found on official EBS channel. Clip called "[6화~10화 모아보기] 이제 너랑 친구 안 해!😭 친구랑 싸웠을 땐 어떤 말을 할까?｜#한글 표현｜💥TV로 보는 한글용사 아이야💥｜[EBS놀이터].

For other Korean series search for "Elementary School English".

Pic 2 from Hangeul Heroes ep 4 also young lady in orange bibs (also sitting in both) found on channel 예찬 TV.

I also found a chubby man in yellow shortalls in series Bravo! Wonder Cards (WHY 최고다! 호기심딱지), also on EBS. I haven't checked all episodes.

Rating ~3-4 for now.