Ponzu is an as-is function that is searching for user provided (Defunct) Citra and Yuzu AppImages and make them available (if possible) as emulators inside RetroDECK.
RetroDECK will not provide any new: configs, bugfixes, improvements and support towards this function or the AppImages. If future updates breaks the AppImages it will probably not be fixed, this is a as-is solution.
Your saves and games will not be deleted, so if you decide to re-install them everything will be as you left, except for the configurations that they will reset as RetroDECK defaults.