@peter.medbury if a member submits or edits a Custom Module item then you can have Workflows triggered for such cases. But if they are updating their own CRM record then yes, there are no Workflows (you could create a Backlog request for such functionality).
My workaround suggested above most likely will no longer work since v6.3 release as the ability for CRM details to be changed via regular forms has been changed (fixed).
Release notes:
Treepl CMS Features for Treepl Partners & CMS Resellers