I was just about to watch ladybug on Netflix out of boredom and I noticed that marinette already has tiki in the first episode and so I wanted to ask whether it can be that not all of the episodes are on Netflix or the episode will come later
I think that's how the series begins
No, not all episodes are on Netflix.
She already has Tiki in the first episode because the series doesn't start with both becoming superheroes.
Her origins only come in season 1 episodes 25 and 26.