Trim Path moved to a different spot in the Properties panel.
Before, Trim Path was directly visible in the Stroke settings. Now, the Stroke section has tabs - you need to switch to the Effects tab to find it.
Select a shape with a stroke.
In the Properties panel, open the Stroke settings.
Switch to the Effects tab.
Click the + button to add a new path effect.
Choose Trim Path from the list.
Once added, everything works the same. You can still animate start, end, and offset like before.