Mismatch information about the content host on the Satellite6

rhsmcertd: Periodically scans and updates the entitlement certificates on a registered system. Red Hat provides content updates and support by issuing subscriptions for its products. These subscriptions are applied to systems (machines). Red Hat Subscription Manager is a tool which allows administrators to manage those subscriptions by registering systems and people, applying subscriptions, and viewing subscriptions.

Check if rhsmcertd service is running on the host:

systemctl status rhsmcertd 
#if not running then start it.
systemctl start rhsmcertd
subscription-manager refresh

rhsmcertd rely on the /etc/rhsm/rhsm.conf file and the information will reflect within the time period specified for autoAttachInterval

If above does not help then follow below:

Login to satellite portal > Administrator > Settings > Puppet > Update environment from facts > yes

Update the facts from the host:

subscription-manager facts --update
subscription-manager facts --list

If both the above solutions does not help then run below command to update the pulp database on Satellite server:

foreman-rake katello:reimport