SharePoint hub site is not syncing permission to its associated sites.

Hi All,

We have a communication Hub site and there are many associated sites to it including community and team sites. For few of them the Sync Hub permission is not syncing visitors permission. Somewhere I read it take sometime to sync but now it is days after the sync is enabled for Hub site and associated site but the permission is not synced yet.

Can anyone suggest any possible solution for it, it will be of great help.