if you like the pricing and licensing, functionally QT may be for you. The web frameworks mentioned on the other hand are free to use for everybody and anything.
https://github.com/electron/electron/blob/main/LICENSE
So everyone can use it without the need to expose his IP.
See for instance one of the most core Blink data structures: https://chromium.googlesource.com/chromium/blink/+/refs/head...
That is the exact same license than Qt, you do not need to expose your IP when using it (Tesla used LGPL Qt for their car dashboards and you don't see that IP floating around on the internet)