Simulators not appearing for certain targets

I'm having a problem where the iOS simulators are not showing up for a certain target, but are showing up for others within the same workspace.

I've checked that the deployment target is compatible with my simulator versions. I've tried re-installing Xcode, restarting the computer, cleaning the build folder, deleting DerivedData, and various other superstitious activities with no luck.

I've also tried reverting to old versions of the project to see where things went wrong, but haven't been able to get them to appear that way either, though I know they were working previously.

The one thing that changed recently that may be relevant is that I had to switch to using manual provisioning profiles for the target, since it uses the multicast networking entitlement. However, removing that entitlement and reverting to automatic signing doesn't fix the issue either.

Any advice is much appreciated.