A new leak from Ice Universe speculates that Samsung could demonstrate the power of its AMD Radeon mobile GPU in 2021. However, it will be launched at a later point alongside a new Exynos chip. We're probably looking at a 2022 launch alongside the Samsung Galaxy S22 series.
https://www.notebookcheck.net/Samsung-could-demonstrate-custom-AMD-GPU-in-June-2021-launch-unlikely-to-happen-this-year.523997.0.html