Idk about the gpu screen recorder but for the keychain for Discord if you disable the KDE wallet subsystem (which is just in the kde system settings) it should stop asking. it’s never caused me an issue and made the discord popup go away. its a dirty solution but its what worked for me.
How do I get rid of excessive password prompts, with the least amount of lost security?
I understand they are important and are what makes linux relatively secure compared to windows....