Not sure how easy it is to get your totp seeds from authy but if you can add them to a kdbx database instead that way you can use any editor on desktop or mobile. Some popular editors are keepassdx for android, keepassxc on desktop (think all systems but could be wrong) and keepassium or strongbox on iOS. Obviously backup your databases following the 3,2,1 rule.
Not sure how easy it is to get your totp seeds from authy but if you can add them to a kdbx database instead that way you can use any editor on desktop or mobile. Some popular editors are keepassdx for android, keepassxc on desktop (think all systems but could be wrong) and keepassium or strongbox on iOS. Obviously backup your databases following the 3,2,1 rule.