Which multiplatform SDK can you recommend?

[Gordon_Tewan]

I am a universal coder, so a request to create a program can come for any platform, both an operating system on PCs and OS adaptation on smartphones. I need an SDK that works seamlessly on all platforms and won't cause me any difficulties. Maybe someone has used Visioforge https://www.visioforge.com/ ? If I'm not mistaken, they work on all palftorms, even on not particularly popular Linux and there you can run code on multiple platforms using modern cross-platform frameworks like MAUI and Avalonia. Which multiplatform SDK can you recommend?