hi everyone, are there any episodes of Ranma1/2 that have not been shown yet? I watched the whole episodes but in last one Ranma still turns into a girl

All episodes are collected. The anime doesn't adapt all of the manga, but even in the manga ending nothing gets resolved, so it's not like he ever lifts the curse or even is able to admit his feelings for Akane.

If you want a Takahashi romance that actually has an ending, do Maison Ikkoku instead.