Symptoms
After Copy structure and content, list conditional formatting is not applied in your destination site.
Details
Conditional formatting rules for lists are migrated to your destination site by ShareGate Migrate, but are not applied.
Workaround
To apply conditional formatting rules for a list:
In SharePoint, open the list view dropdown and select Format current view.
Select Conditional formatting.
Click Advanced mode.
Click Save to apply the conditional formatting rules.