Docker inspect $container should return you most of the info for the container. You can also get a shell inside the container via docker exec -it $container sh. If you have a dockerfile for the container you can see how the container has been set up.
Additionally the shell history can also yield useful information on what has been done. Docker saves the logs of running containers in /var/lib/docker/containers
You can run containers as systemd services with the help of podman: https://www.putorius.net/how-to-start-podman-containers-on-boot.html
Where the containers built by someone in your company or provided by the software vendor?
LFCS should be on par with RHCSA. CKA is also a good certificate which should get you a good return.
From my point the RHCSA is still a valid exam despite RedHats recent moves. HR Drones and Managers won’t care what RedHat is doing as long as they are supporting their products.
Did you install any new apps in the last few weeks? I also got an iPhone 11 Pro sitting at 91% battery capacity. I found that sometimes apps in the background reduce my battery drastically.