Recovering deleted messages on Discord is generally through the platform itself once they have been removed from its servers. While Discord does not provide a built-in recovery tool, there are specific workarounds and preventive measures users often employ. Official Discord Stance & Native Limitations

Personal backup. Cons: Technically complex and potentially unsafe. Security Warning: Scams to Avoid

For individual DMs, take screenshots of important conversations as they occur.

For server owners, setup a dedicated logging channel immediately.