Am I Actually the Strongest? manga volume 1 features story by Sai Sumimori and art by Ai Takahashi.

Being reincarnated into another world with the promise of a "cheat" power is one thing, but being reborn as a baby, and then left for dead after your royal parents think you're powerless? That's another thing entirely! Now the newly born Reinhart--Hart to his new friends--must find his way through a dangerous world...but luckily he's got magic that's quite literally off the charts!