Any manga where the MC is reincarnated or „teleported“ to a new world? I already read...

ghosty doctor, doctor elise, shen yi di nu, peerless alchemist, feng qi cang lan,
feng ni tian xia, and pretty popular rn: solo leveling

most are ongoing ^^

actually all are ongoing... pretty slow update

Does it have to be a female lead or something? Because I have one but it's COMPLETELY different from the set of manhwa/mangas you're currently reading lol.
http://www.mangago.me/read-manga/kumo_desu_ga_nani_ka/

If you're okay with male MCs (no harem or romance btw):
http://www.mangago.me/read-manga/saihate_no_paladin/
http://www.mangago.me/read-manga/freeter_ga_jimini_isekai_teni_suru_manga/
http://www.mangago.me/read-manga/tondemo_skill_de_isekai_hourou_meshi/

Oh, there's these:

> hinted to be the reincarnation of an isekai'd female highschooler, repeatedly reborn and falling for hero
http://www.mangago.me/read-manga/this_time_i_will_definitely_be_happy/

>reincarnated into a fantasy world, invents magic devices
http://www.mangago.me/read-manga/madougushi_dahlia_wa_utsumukanai_dahliya_wilts_no_more/ and its sorta sequel but can be read on its own: http://www.mangago.me/read-manga/magic_artisan_dahliya_won_t_hang_her_head_a_free_craftsman_life_from_now_on/

>reborn in a yandere game rip
http://www.mangago.me/read-manga/it_seems_like_i_got_reincarnated_into_the_world_of_a_yandere_otome_game/
http://www.mangago.me/read-manga/the_result_of_being_reincarnated_is_having_a_master_servant_relationship_with_the_yandere_love_interest/

>customer support lady has to deal with tyrant emperor
http://www.mangago.me/read-manga/what_kind_of_empress_is_this/

>would rather marry support character than otome LIs
http://www.mangago.me/read-manga/the_villainess_want_to_marry_a_commoner/

>in fact let's just go for the commoner life lol
http://www.mangago.me/read-manga/lady_rose_wants_to_be_a_commoner/

> how about commentating instead of transporting/reincarnating into said world
http://www.mangago.me/read-manga/endo_and_kobayashi_s_live_commentary_on_the_villainess/

>POV of the LI dealing with a self-proclaimed reincarnation
http://www.mangago.me/read-manga/jishou_akuyaku_reijou_na_konyakusha_no_kansatsu_kiroku/

>the absolute PINNACLE of otome villainess, reverse harem
http://www.mangago.me/read-manga/otome_game_no_hametsu_flag_shika_nai_akuyaku_reijou_ni_tensei_shite_shimatta/

>ally with the demon king to avoid death flag
http://www.mangago.me/read-manga/i_m_a_villainous_daughter_so_i_m_going_to_keep_the_last_boss/

>modern day inventions in a fantasy period setting
http://www.mangago.me/read-manga/koushaku_reijou_no_tashinami/

>i'm surprised u didn't mention this
http://www.mangago.me/read-manga/miss_not_so_sidekick/

>isekai, just started, girl dresses up as a guy to avoid trouble
http://www.mangago.me/read-manga/isekai_de_shippai_shinai_100_no_houhou/

>called to another world along with a pretty high schooler, was pushed away even thoguh she's actually the true saintess, an actual saint tbh she's so nice
http://www.mangago.me/read-manga/seijo_no_maryoku_wa_bannou_desu/

>it's like a gacha microtransaction in an isekai wha
http://www.mangago.me/read-manga/chitra/

> reincarnated girl has a system that shows affection meter
http://www.mangago.me/read-manga/it_s_virtually_impossible_to_make_this_boy_like_me/

>this shit is too melodramatic for me but u might like it, sympathises with a book character, finds herself in that very book
http://www.mangago.me/read-manga/the_villain_s_savior/

> author finds herself in her own story while helping the 'villain' of that said story
http://www.mangago.me/read-manga/as_you_wish_prince/

Thanks everyone for recommending a lot of mangas/manwhas! They seem very interesting so I‘m gonna read all of them