Male lead only are kinda rare for me too but here are some
Trash of count's family
Omniscient reader's viewpoint
Wise man's grandson
Demon lord retry
The max level hero has returned
The eighth son are you kidding me
And there's one where a boy reincarnated into a female vampire and only worried about nap too...but i don't remember the name also since he was reincarnated to a female vampire im not sure if it counts. Sorry i can't remember the rest..
https://www.mangago.zone/read-manga/the_emperor_reverses_time/
im not sure if youve read it or not but, the male lead is the one who time travelled and the story is mostly from the male lead's pov, happy reading !! ^^
i really wanna read a manhwa or manga like this but with a male lead only. ive only seen strong female leads when it's stories like these.
i dunno where to start to look for them but if someone finds something, please do reply and recommend!