I’ve only uploaded a jpg. I was under the impression that the normal way of posting here was to upload the raw and a dop - but the site software would not allow me to do that - I will have to do a bit of research.
You only need to upload RAW and DOP if you want others to play with the original. And you would need to state the version of PL used to create the DOP.
If your RAW file is too large, you are best using a file sharing site and posting a link to the download here.
Otherwise, if you only want to share the image, the JPEG is fine.
If you search the forum you’ll find topics about the inability to upload .CR3 files. However for reasons no one can understand, DxO have ignored all requests to allow their upload.
Until @DxO_Support-Team bother to address this problem if you ZIP a .CR3 file you should be able to upload the .zip version.