In KWin’s new (off-by-default) “Hide Cursor” effect, you can now turn off hiding it after inactivity, and only hide it while typing (Vlad Zahorodnii, Plasma 6.2.0. Link)
Does Plasma Bigscreen still receive updates? This feature would be very useful with it. Arch’s bigscreen package is unfortunately stuck at 5.27
Yes, there aren’t many intensive mobile games. But the games that push the hardware have a very large playerbase ie. Genshin impact, Fortnite. So for mobile games this will be a valuable feature if it is implemented well. This won’t help with PC games on mobile because frame gen needs games to reach a certain FPS threshold before being useful. It can’t make a 15 FPS game playable. All PC gaming on Android benchmarks I have seen focus on older games, not new AAA.