I do TTRPG stuff on my iPad primarily. What do you use to export your files?
They are primarily exported from Affinity. Out of thousands of downloads, I've only had a handful of folks have issues with it, even those on the iOS viewer. It's been hard to troubleshoot, but I'll attempt a fix here and export a few different versions and upload them here in the next day or two. It's odd! Sorry for the issues!