Upgrading single components is not possible on our Bitnami stacks and cloud images. We updated OpenSSL to version 1.1.1d on our CanvasLMS assets released on September 18th this year. Can you try using the latest CanvasLMS version that ships the latest OpenSSL version? If it works fine, you will need to migrate the CanvasLMS information on your current instance to the new one.
You can get more information about the recent changes on our CanvasLMS assets in the link below