Turns out all the "unremovable" Samsung apps from the android Galaxy A14 can be uninstalled after all. It's convoluted, but worth it: far snappier – far more responsive, less memory usage.
Enable developer options.
Under developer options, enable USB debugging.
connect to a laptop via USB.
Install "adb" (Android Debug Bridge) in the laptop, a command like tool. In Ubuntu 22.04, do "sudo apt install adb". There are packages online for other operating systems.
Discover which apps to remove. Not trivial, but there are various lists of Samsung "bloatware" online.
Then, use adb to discover which packages to remove. For example:
If no apps match the search, then use the "App List" (installable via F-Droid store) to list all user apps or system apps (from a toggle on the top-right menu), which lists all apps by name and with the package name under it.
An app that I removed that indeed drops some possibly valuable services but which greatly improve UI responsiveness: