What do you mean by "all right?" What are your concerns?
restic backups are encrypted by default; it should be safe to store them almost anywhere in the cloud. The container needs the credentials, but you can improve security with something like OpenBAO (Hashicorp Vauly fork, github.com/openbao/openbao), SOPS (gitgub.com/getsops/sops), infisical (github.com/Infisical/infisical), or any number of other secrets management tool.