Yes, but be careful which totp app you're using to store seed values/secret keys : some store them as plain text! Personally on android I'm using keepass2android and keepassium on ios to store both the QR image and the string value. It will also generate the OTP value at login. As you know, the keepass password file can be backed-up anywhere.
Also, other TOTP generators like Authy and Aegis let you backup your tokens to restore to another device.