@Anonymous , Thanks for posting in Q&A. From your description, I know we have created a dynamic device group and assign WiFI profile to this group. But the WiFI profile is not applied after the enrollment. If there's any misunderstanding, feel free to let us know.
For the WiFI profile will not apply immediately after the enrollment. on my point of view, this is because when we enroll the device, the device record in both AAD and Intune will be created and refer. For Dynamic device group, when a new device satisfies the rule join the organization, it may take some time like 30 minutes or longer to populate. To check if the member is added, you can check the members of the device group. Here is a link with more details for the reference:
https://learn.microsoft.com/en-us/azure/active-directory/enterprise-users/groups-troubleshooting#troubleshooting-dynamic-memberships-for-groups
After the device is added into the device group, then the device will apply the policy during its check in time. This will also cause some time delay. You can read more information with the check in estimated in the following link:
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
Therefore, in our situation, the Intune WiFi profile will not be applied immediately after the device enrolled. We need to wait some time.
Hope the above information can help.
If the answer is helpful, please click "Accept Answer" and kindly upvote it. If you have extra questions about this answer, please click "Comment".
Note: Please follow the steps in our documentation to enable e-mail notifications if you want to receive the related email notification for this thread.