@Alex Maitland , Based as I know, the refresh cycle for windows 10/11 PCs enrolled into Intune is 8 hours. But you can sync to get the policy. You can go to the device side, click Settings->Accounts-> Access work or school->find the account and click info, then click sync to get policy.
https://learn.microsoft.com/en-us/mem/intune/configuration/device-profile-troubleshoot#how-long-does-it-take-for-devices-to-get-a-policy-profile-or-app-after-they-are-assigned
However, if it is still not working, you can check the policy deployment status in the Intune Portal and check the Registry keys on the device side to confirm if the policy is deployed successfully. Here is a link with more details for your reference:
https://techcommunity.microsoft.com/t5/intune-customer-success/support-tip-troubleshooting-windows-10-update-ring-policies/ba-p/714046
Hope it can help.
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