Thank you all for your answers.
I already knew the answer I just wanted to be sure.
Maybe I wasn't clear but I already Lost the password (because I never saved it because I knew that private key is enough), but then a second later - second guessing came in , because who know, what works for BTC or any other coin not necessarily means it's the same in ETH.
but with that I do understand that it's all comes to the same cryptography- AES128..so the private key can be used after opening a new wallet and import the private key.
Just wanted to be 100% sure that I won't get f in the future.
Your biggest mistake does not save phrases, even though this is the most important key to stored, but it is natural when there is something important we even forgot to save properly, hopefully in the future all of us can learn from this little thing, so that if Having assets in the wallet did not just disappear, and actually many people also experienced it, at the beginning of knowing Crypto