Heads up for anyone on a commercial license (this does not affect the LGPL-Version): Qt6 does not offer a perpetual license anymore, you need to switch to a subscription license. The catch is that you need a subscription license not only for development but also for distribution, meaning: you need to have a subscription for as long as you distribute your software with Qt6 under the commercial license!
Again: This only affects the commercial version! Nothing changes if you're using the LGPL version.
Again: This only affects the commercial version! Nothing changes if you're using the LGPL version.
See also: (German) https://www.heise.de/news/Qt-6-Abomodell-koennte-zum-Fallstr...
(Google translate/English): https://translate.google.com/translate?hl=en&sl=de&u=https:/...
https://www.qt.io/faq/tag/subscription
EDIT: You also need a license if you only use your software with the commercial Qt6 license.