Under Broadcom support Portal > Entitlements page, the entitlement shows correct end dates.
However, on the device, it's showing an incorrect end date i.e. 2023-04-28.
ProxySG/ASG
First confirmed no network issue connecting to license servers.
https://techdocs.broadcom.com/content/dam/broadcom/techdocs/symantec-security-software/web-and-network-security/common/ports_reference.pdf
On-device follow the below steps.
Request the appliance certificate.
-- In the Management Console, select Configuration > SSL > Appliance Certificates.
-- On the Request Certificate tab, select Request Appliance Certificate.
-- On the Confirm Request prompt, select OK.
-- The Symantec CA server does validation checks and signs the certificate. The certificate is automatically included in the appliance-key keyring.
The device would need to "abrca.broadcom.com" on port 80 to pull the Appliance Certificate.
After this, we need to restart the device.
And then retrieve the license:
1. In the Management Console, select Maintenance > Licensing > Install.
2. Click Retrieve.
3. In the dialog box that displays, do the following:
a. Enter your account login information.
-- In some cases, the import of a license file is needed as well.
https://techdocs.broadcom.com/us/en/symantec-security-software/web-and-network-security/proxysg/7-2/introduction/licensing/registering-and-licensing-the-appliance/manually-installing-the-license.html
After importing, dates are corrected.