RECS

I've never read the stories you mentioned, but they seem to be about unrequited love?
So here are some GLs with unrequited love:
https://www.mangago.zone/read-manga/kono_koi_wa_hoshi_ni_wa_negawanai/
https://www.mangago.zone/read-manga/sasameki_koto/
https://www.mangago.zone/read-manga/unrequited_love_skill/
https://www.mangago.zone/read-manga/futsuu_no_koitte_nani/
https://www.mangago.zone/read-manga/a_monster_wants_to_eat_me/
https://www.mangago.zone/read-manga/haru_and_midori/
https://www.mangago.zone/read-manga/aoi_hana/
https://www.mangago.zone/read-manga/yuri_na_kataomoi_chan/
https://www.mangago.zone/read-manga/omoi_no_kakera/
https://www.mangago.zone/read-manga/watashi_sekai_o_kousei_suru_chiri_no_you_na_nani_ka/
https://www.mangago.zone/read-manga/kimi_koi_limit/
https://www.mangago.zone/read-manga/gunjou/
https://www.mangago.zone/read-manga/shinyuu_ni_sukina_hito_ga_dekitarashii/
https://www.mangago.zone/read-manga/this_love_that_won_t_reach/ (age gap, MC is in love with her sister-in-law; rushed and ambiguous ending)
https://www.mangago.zone/read-manga/the_story_of_a_person_who_grew_a_flower/ (short story; age gap, teacher-student relationship;hanahaki disease)

And I think two of those stories you mentioned have a younger top, so here are some recommendations with that:
https://www.mangago.zone/read-manga/even_if_it_was_just_once_i_regret_it/
https://www.mangago.zone/read-manga/love_thy_neighbor_2/
https://www.mangago.zone/read-manga/shinrosimbulro/
https://www.mangago.zone/read-manga/the_marriage_partner_of_my_dreams_turned_out_to_be_my_female_junior_at_work/
https://www.mangago.zone/read-manga/for_garbage/
https://www.mangago.zone/read-manga/can_t_give_her_up/
https://www.mangago.zone/read-manga/jk_chan_and_her_male_classmate_s_mom/
https://www.mangago.zone/read-manga/housewife_x_jk/
https://www.mangago.zone/read-manga/lass_2/
https://www.mangago.zone/read-manga/unnie_i_like_you/
https://www.mangago.zone/read-manga/other_than_my_friend_s_sister_something_else/
https://www.mangago.zone/read-manga/golden_ratio_i_don_t_want_to_be_far_from_love/
https://www.mangago.zone/read-manga/drown_in_the_angel_s_swamp/
https://www.mangago.zone/read-manga/please_teach_me_sunbae_nim/
https://www.mangago.zone/read-manga/immoral_parody/ (dub-con)

um no they aren't exactly unrequited. they are age gaps and known each other's since the other person as kid and likes the older person, ya know? haha. BUT THANKYOU FOR THIS I'M REALLY CRAVING FOR SOME GLS THESE DAYS AHA