Many Bitnami users come to this forum after having trouble getting Certbot (or other tools) to integrate well with Bitnami.
However, Bitnami has its own set of official recommendations on how to use Let’s Encrypt with Bitnami tools:
https://docs.bitnami.com/aws/how-to/generate-install-lets-encrypt-ssl/
Following this official guide will produce a smoother experience compared to other methods.