And today arrived the Xojo May 2021 Newsletter featuring a Xojos blog post called The Benefits of Native Apps
Quoting that post “Xojo creates native apps and uses the native user interface toolkit on each platform.”, But, that is a LIE, at least on windows many controls are not native, just as in that post they feature as an example the MessageDialog on MacOS, BUT on windows the MessageDialogs are just a custom window that don’t even try to use the system colors or alignments, let alone the behavior of a real native dialog 
There is a Feedback for that: <https://xojo.com/issue/58113>
Same problem with the xojo tooltip class, it is just another window not even using the system colors.
also with a Feedback case: <https://xojo.com/issue/54584>