How to export a file exported as postscript type 1 back to opentype postscript

I have completed the design and exported it to OTF. I chose OTF to export to Open Type Postscript, but the file was exported to OTF Postscript type 1. May I know how to export back to Open type postscript? During the export process, the only option was OTF/TTF. I wonder if there is anything I must check in advance to prevent this problem in the future.
Thank you for always answering my questions.

What do you mean by OpenType type1?