Responses
https://www.mangago.zone/read-manga/my_mom_entered_a_contract_marriage_bored_corona_kids_version/
and for the others there is no regression but mc are actual kids :
https://www.mangago.zone/read-manga/there_is_no_place_for_fakes/
https://www.mangago.zone/read-manga/the_princess_in_the_dumpster/
https://www.mangago.zone/read-manga/the_baby_prisoner_in_the_winter_castle/
does anyone have recommendations about childcare or regression or maybe reincarnation manhwas, where the mc isn't the one who who goes back in time but someone else