Hello,
Thank you so much for posting here.
To identify which GPO is taking longer time to apply, we could refer to the below links:
https://deployhappiness.com/troubleshooting-slow-startup-or-login-times-caused-by-group-policy/
Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.
Best regards,
Hannah Xiong
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