XnView Software

Yes the portable zip version (of XnView MP) works for me.

This here has infos on building from intel CPUs too, and for testing either you could ask users (I'd be happy to try a build) or there are VMs on Azure too.

https://learn.microsoft.com/en-us/windows/arm/add-arm-support#steps-to-add-arm64-native-support

> as soon as i get a Surface Pro 11, i'll try ...

This was requested a few years back (https://newsgroup.xnview.com/viewtopic.php?p=159973#p159973) and back then it made complete sense to ignore it IMO, but with Microsoft having stepped up their game in terms of emulation lately, and the new Surface Pro 11 / Surface Laptop shipping with high end ...