Did I brick my iMac by resetting it without uninstalling OCLP first?

Hey everyone. So I have a 2015 iMac that I've been using OCLP on for the past year or so, and it was currently on Sequoia 15.1. Today, I wanted to reset it so I could give it to a family member, and I forgot that OCLP was something that I needed to work out before resetting. I formatted the drives with Disk Utility in recovery mode. I then tried to reinstall macOS Sierra from recovery mode, and get the error that it could not be completed each time. When booting the Mac normally, I have three options on the screen: BootKicker.efi, OpenShell.efi, and Reset NVRAM. Selecting any of the three options just brings me back to that same screen. Am I screwed?