

From what I’ve seen if an online store provides a 16 bit classic without a reimplementation, it’s bundled with dosbox.
Of course, I’m pretty much blanking on any classic Win16 titles of note. As far as I recall the significant games just kept being DOS games with at most launch from icon. I suppose original Myst because QuickTime, but they released a Win32 build. But this 16 bit stuff was a speculation, this is about the 32 bit stuff that isn’t reasonably accommodated without a 32 bit runtime and certain bits being at odds with Flatpak isolation architecture.
Also codecs… even with the right repositories enabled, you’ll tend to install a media application that manages to be utterly incapable of actually processing most media.
They’ve made strides on this front but it’s still messed up.
Also sometimes they are too aggressive on one front. Some of the applications you can install from their repository that have some python based features are broken because they can’t handle python 3.13. There’s some ability to install python 3.12 but without much beyond the core making it less useful.