1. Aegis has a setting for creating secure backup on every change.
2. Autosync that backup directory via syncthing to your PC.
3. Run a compatible desktop software (e.g. linux has authenticator) to import aegis backup files manually.
Since totp addition is not a frequent activity, the last manual import step was not a hassle to do whenever needed.
Since totp addition is not a frequent activity, the last manual import step was not a hassle to do whenever needed.