 If you liked
Solo Leveling
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 ...then you might like
Omniscient Reader's Viewpoint
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Both have main characters who are gifted a special power but must still struggle to overcome challenges unique to them to truly get stronger. They're both anomalies in their power systems and have to uncover the nature of their respective worlds.
Omniscient Reader is more about the world building (I like it a lot more), while Solo Leveling leans heavily into the power fantasy aspect.