Thanks for doing the test.
As you can see, the email is fully optimized for deliverability. It has valid SPF, DKIM and DMARC configuration. We can’t really do anything better here.
Which email provider sent it to junk? It might be a good idea to reach out to their support and ask why the email was marked as junk.
The only potential problem with your email is that you are using the default wording that comes with the plugin. It is likely that thousands of other stores use exactly the same wording. It could be a red flag for junk email filters. Please do reach out to the email provider to confirm why the message was marked as junk but also try to be more creative and unique with your email copy.