My question is: on Blockchain.com wallet a transaction fee in the last 3 years has not changed ?
Do you mean value in dollars? Or Satoshi?
Generally, the value (transaction fee) changes and if you don't know what to do it is best not to change the default settings even if they are expensive.
If you have time, read more about wallets and try a safer wallet (electrum, greenaddress,...etc.)
If you do not speak English, post on local boards.