Importing PdF with comments

I’m trying to import a PdF file, which has annotations and comments, to the research folder.
When opening the file on Scrivener I see the highlights and the PdF symbol for comment but the comments themselves were not imported to Scrivener. Nor is there a way to add comments to the file on your platform.
Please help.

I am also in need of an answer to this question please

I think the answer is that you have to view them in a pdf reader.