You basically answered your own question.
While PD18/365 can import various kinds of 10-bit clips, it can only produce 8-bit video, which is why you don't see any HDR or 4:2:2 output profiles. All currently supported input and output formats are shown on this spec sheet
page.
You can certainly request 10-bit producing capability by going to
File,
Rate Us & Provide Suggestions, but there's no way to know how long it might take for that new feature to become available.
YouTube/optodata
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