Is there an option on NeoChat to manually add a key to decrypt old messages? All of my messages are hidden with a "This message is encrypted and the sender has not shared the key with this device." and I cannot find a way to request keys from the server or to use my backup key. Thanks!
Yes; see https://invent.kde.org/network/neochat/-/wikis/FAQ#after-logging-in-to-neochat-i-cant-read-any-existing-decrypted-mesages--how-can-i-import-decryption-keys--i-verified-my-session-in-element-and-still-cant-read-encryted-messages