'Herscherik - The Epic of the Reincarnated Prince'-- had both of these but the mc isn't exactly a child, aside that, story was going amazing but seems it's dropped, dunno about the novel tho
https://www.mangago.zone/read-manga/the_male_lead_is_unhealthily_obsessed_with_my_health/
https://www.mangago.zone/read-manga/becoming_the_queen_at_the_age_of_six/
https://www.mangago.zone/read-manga/the_minence_grise_orca_baby/
https://www.mangago.zone/read-manga/i_m_being_raised_by_villains/
https://www.mangago.zone/read-manga/i_became_the_despised_granddaughter_of_the_powerful_martial_arts_family/
https://www.mangago.zone/read-manga/my_mom_entered_a_contract_marriage_bored_corona_kids_version/
https://www.mangago.zone/read-manga/please_give_me_the_pacifier/
https://www.mangago.zone/read-manga/i_was_just_having_fun_with_the_time_limit/
https://www.mangago.zone/read-manga/baby_tyrant/
https://www.mangago.zone/read-manga/the_princess_in_the_dumpster/
https://www.mangago.zone/read-manga/i_adopted_a_villainous_dad/
https://www.mangago.zone/read-manga/how_to_be_a_dark_hero_s_daughter/
https://www.mangago.zone/read-manga/lord_baby_runs_a_romance_fantasy_with_cash/
https://www.mangago.zone/read-manga/the_strongest_characters_in_the_world_are_obsessed_with_me_bored_corona_kids_version/
https://www.mangago.zone/read-manga/it_s_my_first_time_being_loved/
https://www.mangago.zone/read-manga/surviving_as_an_illegitimate_princess/
https://www.mangago.zone/read-manga/an_unseemly_lady_wicked_dragons/
https://www.mangago.zone/read-manga/i_played_the_role_of_the_adopted_daughter_too_well/
https://www.mangago.zone/read-manga/lotto_princess/
https://www.mangago.zone/read-manga/i_am_the_precious_daughter_of_the_greatest_villain_in_the_fantasy_world/
https://www.mangago.zone/read-manga/a_saintess_who_was_adopted_by_the_grand_duke/
https://www.mangago.zone/read-manga/baby_snow_leopard_of_the_black_leopard_family/
https://www.mangago.zone/read-manga/i_was_reincarnated_as_a_baby_fox_god/
https://www.mangago.zone/read-manga/black_killer_whale_baby_promo/
https://www.mangago.zone/read-manga/the_villainous_princess_wants_to_live_in_a_cookie_house/
https://www.mangago.zone/read-manga/the_chick_class_hunter_is_filial/
https://www.mangago.zone/read-manga/my_daddy_hides_his_power/
https://www.mangago.zone/read-manga/born_as_the_daughter_of_a_lowly_concubine/
https://www.mangago.zone/read-manga/the_baby_raising_a_devil/
https://www.mangago.zone/read-manga/taming_the_munchkin/
https://www.mangago.zone/read-manga/i_will_protect_my_tyrant_dad/
Have you read any of these pookie?
More Child MC or Historical Manhwa pls