Does AWS Bitnami stay up to date?

Bitnami Engineer here,

we build and install the packages from scratch, do not use the system packages to install the web server or the runtime in your machine. Using the apt commands will update the rest of packages in the system (ssh, openssl, and other libraries) but will not update the Apache's, Node.js' or PHP's version.

Please note that we do not run the apt command for you, if there is any new version of those packages, you will need to run the apt command and install them.

In case you want to update the Apache's or PHP's version, you will need to launch a new instance that contains the latest versions of those components and migrate your data to that new one.