[Packaging] [Craft] Trimming Windows app package size?

Using Craft, I can build and package my app for Windows. After extensive testing and creating a blacklist, I was able to trim the package size down to ~150MiB (~50MiB zipped), which is still very large for such a simple app. Most of the size comes from ICU (>30MiB) and Breeze Icons (~22MiB).

For ICU, it seems from what I have searched that I could technically trim it down by using custom data. Unsure how to do it with Craft, though. Do I need to recompile Qt and KF if I go down this route?

For Breeze Icons, I see that there kirigami_package_breeze_icons but that is only enabled on Android. Looking at the source, I don’t see any reason why it won’t work on other platforms.

Is there any suggestion? The easiest route would be just let it be.