@Rook Please write this in the topic.
(Sideloadly isn’t working as it should for most people, because they don’t have developer options enabled in ios 16-17. It is hidden so you really can’t use sideloadly to enable dev mode, because you need to sideload a app first for the option to show)
So if anyone is struggling with enabling developer mode in the options, because it is not showing up and you have a computer with windows, just install 3utools and sign any app you want using the ipa signing tool the program provides. After that there is a section in 3utools where you can drag the signed app to your phone or you can just drag it via iTunes… then just go to Settings > General > VPN & Device Management and just click on the profile that appears and trust. After sideloading an app you should see developer mode in the options as in this topic.
*If needed i can take screenshots to make it more clear*