This person's LinkedIn profile and Bullhorn profile are both up to date, so you will not see the mismatch warning in the extension.
If you run the SourceWhale extension on a person's LinkedIn profile, and the Integrations Warning: Company Mismatch is shown, you will need to resolve this mismatch before proceeding.
The reason your CRM icon isn't initially showing is that we want to be 100% sure it's the correct contact match.
To resolve the Integrations Warning and see the Bullhorn Icon on the contact's profile you must choose either of the two options below:
Associate the contact with the existing contact on the Integrations tab
Select the correct company
In doing so, the contact will be added to your SW contacts too.
Now the CRM icon will be shown as expected :