Hiii

https://www.mangago.zone/read-manga/the_delusional_girl_and_the_wicked_nurse/
https://www.mangago.zone/read-manga/that_s_puberty_for_you/
https://www.mangago.zone/read-manga/hokenshitsu_sensei_to_m_s_suki_chan/

https://www.mangago.zone/read-manga/lily_marble/
multiple story some are age gap related

https://www.mangago.zone/read-manga/even_if_it_was_just_once_i_regret_it/

https://www.mangago.zone/read-manga/raubritter/

https://www.mangago.zone/read-manga/love_wins/

https://www.mangago.zone/read-manga/syrup_pure_onee_loli_yuri_anthology/
some are good

https://www.mangago.zone/read-manga/for_garbage/

https://www.mangago.zone/read-manga/just_right_there/

https://www.mangago.zone/read-manga/there_s_weird_voices_coming_from_the_room_next_door/

https://www.mangago.zone/read-manga/sensei_ni_wa_mada_iwanai/

https://www.mangago.zone/read-manga/half/

https://www.mangago.zone/r/l_search/?name=Itou%20Hachi
this author have lots of age gap

https://www.mangago.zone/read-manga/ane_no_yujin/

https://www.mangago.zone/read-manga/it_s_okay_senpai/
bit of age gap

https://www.mangago.zone/read-manga/mebae_vivid_girls_love_anthology/
bit of age gap

https://www.mangago.zone/read-manga/strawberry_parfait_oneeloli_yuri_anthology/

https://www.mangago.zone/read-manga/my_demon_secretary/

https://www.mangago.zone/read-manga/witches_marriage/

https://www.mangago.zone/read-manga/lilith_sirius/

https://www.mangago.zone/read-manga/lilith_2/