Mixing ratings with Mylio XMP

Hi Guys,
Huge fan of FRV, been using it for years. For reasons of collaboration and work on mobile devices, I'm occasionally using Mylio to evaluate photos. Mylio also creates XMP files (albeit much larger) for rating. The files read in thumbnail view but not in individual view.
What's worse is that when the Mylio XMP is there, it's impossible to re-rate a file (after doing a set of 2000 sports photos, I drop the four-five star photos into a folder for further triage, where quality is just one issue but also repetition).
Here's what the XMP looks like.
<x:xmpmeta xmlns:x="adobe:ns:meta/" x:xmptk="XMP Core 6.0.0">
 <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
  <rdf:Description rdf:about=""
    xmlns:exif="http://ns.adobe.com/exif/1.0/"
    xmlns:xmp="http://ns.adobe.com/xap/1.0/"
    xmlns:MY="http://ns.mylollc.com/MyloEdit/"
    xmlns:tiff="http://ns.adobe.com/tiff/1.0/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:xmpMM="http://ns.adobe.com/xap/1.0/mm/"
   exif:DateTimeOriginal="2022-08-26T19:44:28.000"
   exif:SubSecTime="0"
   exif:SubSecTimeOriginal="0"
   exif:SubSecTimeDigitized="0"
   xmp:CreateDate="2022-08-26T19:44:28.000"
   xmp:ModifyDate="2022-08-26T19:44:28.000"
   xmp:Rating="4"
   xmp:MetadataDate="2022-08-27T03:32:43.737Z"
   MY:DateRangeStart="2022-08-26T19:44:28.000"
   MY:DateRangeEnd="2022-08-26T19:44:28.000"
   MY:DateRangeScope=""
   MY:Undated="false"
   MY:flag="false"
   MY:processVersion="1"
   MY:MetadataDate="2022-08-27T03:32:43.737Z"
   tiff:Orientation="1"
   xmpMM:DocumentID="A3A3B5E0-1212-47B7-AAD1-766B7FB89CFD"
   xmpMM:OriginalDocumentID="A3A3B5E0-1212-47B7-AAD1-766B7FB89CFD"
   xmpMM:InstanceID="xmp.iid:790DABE4-5A89-47FA-B350-3D7AA783C53D">
   <exif:ISOSpeedRatings>
    <rdf:Seq>
     <rdf:li>6400</rdf:li>
    </rdf:Seq>
   </exif:ISOSpeedRatings>
   <dc:creator>
    <rdf:Seq>
     <rdf:li>Alec Kinnear</rdf:li>
    </rdf:Seq>
   </dc:creator>
   <dc:rights>
    <rdf:Alt>
     <rdf:li xml:lang="x-default">Uncoy.com</rdf:li>
    </rdf:Alt>
   </dc:rights>
  </rdf:Description>
 </rdf:RDF>
</x:xmpmeta>
 
I've attached a PNG as well. I'd attach the XMP but strangely that file format is not permitted.
 
Thanks for taking a look.
 

Cordial regards,
 
Alec