convert to sheet metal and flatten (solidworks)

I have created a loft between two rings in that are in 2 different planes. the rings have a little cut in them so that they can be flattened when converted into sheet metal but I am failing to convert them to sheet metal. Kindly help and guide me.
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Maybe try it this way. I couldn't get it to flatten either the way its modeled.
https://help.solidworks.com/2019/english/SolidWorks/sldworks/c_lofted_bends.htm#:~:text=Lofted%20bends%20in%20sheet%20metal,to%20create%20a%20solid%20feature.