Hello there,
I am new to the Flatpak ecosystem and have recently started using Flatpaks to manage my software across multiple Linux distributions. I am impressed with the portability and consistency that Flatpak offers; but I have a few questions about best practices for maintaining Flatpak applications; especially when working across different Linux distributions.
How can I best manage user data and settings across different distros when using the same Flatpak app? Is there a recommended way to ensure that my configurations and data remain consistent; regardless of the underlying OS? 
I understand that Flatpak allows for easy updates; but I have noticed that some updates do not appear immediately on all distributions. Is there a known reason for this? How can I ensure that I’m running the latest version of an app across all my systems?
I have read that Flatpak apps can consume more disk space due to the inclusion of dependencies. Are there any tips for managing disk usage effectively, especially when using multiple Flatpak apps?
Also, I have gone through this post; https://discourse.flathub.org/t/should-i-trust-flathub-with-important-applications-power-bi/ which definitely helped me out a lot.
Are there specific security practices I should follow when using Flatpaks across various Linux distributions? For instance; how should I handle permissions and sandboxing to maintain a secure environment?
Thank you in advance for your help and assistance. 
) whether you’re talking about ‘maintaining’ apps as a developer, making and updating flatpaks, or as a user, installing and using flatpaks.