What are you looking for? The main couple's dynamic (miscommunication/unrequited requited, duke x king) or something similar to the setting (high fantasy, superpowers, system) or the plot (isekai into game, empire stuff)?
Similar to the setting. Its also fine if its isekaii ^^
I recommend;
System / High-Fantasy / Empires : How To Raise A Victim, Sweetie Sweetie Sweetie, Turning
Dungeons / System / Low-Fantasy-ish : The Hunter Wants To Live Quietly, Kiss The Abyss, Traces of The Sun
Most of these are either isekai/time travel/rebirth
Someone recommend some manhwa's like thisss??????? Pls I'm begging you guysss