From the article itself: "Warner Bros. will include the Warners film and TV studios, DC Studios, HBO and HBO Max, and the TCM cable channel; Discovery will include the former Discovery and Turner linear channels, including TNT, TBS, CNN, Cartoon Network, Discovery, Food Network, and HGTV. It will also include the company's international TV channels, and the Discovery+ streaming service."
Based on that and the chart I listed above I'd guess that Magnolia Network and Animal Planet would both go over to Discovery. Magnolia is iffy based on what the chart says but I'd bet it goes with Discovery.