Any horror/apocalypse/supernatural bl like dead man-switch available? If available, please...

Apocalypse but dungeon style, really good https://www.mangago.me/read-manga/death_delayed_for_a_short_time_because_of_the_will/

Dreadful night

https://www.mangago.me/read-manga/let_s_meet_alive/

https://www.mangago.me/read-manga/the_hounds_of_sisyphus/

Webtoons/manhwas/huas:
https://www.mangago.me/read-manga/the_last_zombie/
https://www.mangago.me/read-manga/rainbow_city/
https://www.mangago.me/read-manga/radio_storm/
https://www.mangago.me/read-manga/believe_my_sign/
https://www.mangago.me/read-manga/over_the_paradise/
https://www.mangago.me/read-manga/monster_in_the_mist/
https://www.mangago.me/read-manga/a_room_without_space_side_story_1/
https://www.mangago.me/read-manga/the_hounds_of_sisyphus/
https://www.mangago.me/read-manga/corrosive/
https://www.mangago.me/read-manga/a_dead_crow_s_stare/

Mangas:
https://www.mangago.me/read-manga/undead_tsuyuhisa_fumi/
https://www.mangago.me/read-manga/boys_of_the_dead/
https://www.mangago.me/read-manga/zombie_hide_sex/

Here you go dear, make sure to click on the blue + to see everything, happy reading!

And if you want apocalypse/survival reads in general, here is my list, hope it helps and you enjoy!
https://www.mangago.me/home/mangalist/3333703/

Dont mind me, just camping here bcz i lik the list

same

Radio storm def one of the best of that genre

Thank you all for your recommendations. I will definitely read them. Their manhwa covers look interesting