"This Week in Plasma" brings the news that...
You can use long-presses on your regular keyboard to access alternative glyphs—just like on your phone, e.g. press and hold down [$] and a popup appears that let's you choose between €, £, ¥, ¢, ₹. Also new is that you can download and install alternative sound themes and that we reduced CPU and GPU load for full-screen windows on screens using more fractional scale factors, and much more!
https://blogs.kde.org/2026/03/14/this-week-in-plasma-press-and-hold-for-alternative-characters/