Simplest: Use proxy mode, install Firefox (or one of its fork if you’re already using Firefox), set the proxy to the Warp port, load the Discord webpage on that browser.
Harder: Extract your WireGuard config with wgcf, then use TunnlTo on Windows or similar app on other platform.
It’s secure & safe, none of my accounts have any trouble for years. The only quirk I notice is I can’t purchase or redeem free games on Epic when Warp is active.
It does, but you have to create a free account and use the Zero Trust client, and a split tunnel rule in include mode that makes the app go through the WARP tunnel. You have to know the Discord IPs or DNS targets.