I’m assuming you signed with your own developer certificate and resigned every 7 days? Last time I did this I was using Cydia Impactor but it’s been a while. I

I’m assuming you signed with your own developer certificate and resigned every 7 days? Last time I did this I was using Cydia Impactor but it’s been a while. I had an automatic local resigning tool on my device that required jailbreak but I think you can also do this with AltStore/AltServer iirc without jailbreak or just do it manually with Xcode. To your original point upthread, you can run Xcode on a macOS virtual machine if you don’t have a real Apple desktop or laptop.