Some wallets such as Electrum, Sparrow, Bitcoin Core and Schildbach wallet have a functionality to import/export encrypted backups with your wallet's encryption password, and this is very interesting
When you export, you have options to export like Export your private key, Export your labels. You only can save your backup and if your wallet is encrypted, the backup will be encrypted automatically. No option to Save your backups without encryption.
When you import, from private key or seed, you can choose to create a new wallet file with encryption or no encryption. You don't need password to import a private key or mnemonic seed.
You only need a wallet password when you open a wallet file that was encrypted before.