The buffered graph is available through the option menu when you press the menu button on your phone. It’s no longer a floating button on the screen.
Regarding using current clamps: How are you connecting the clamps to the meter?
Also note that since the burden resistance of the current reading is very low, you can treat the “A” input as a second common for connecting a floating current clamp. Just be careful and make sure you only connect a floating instrument this way… if you abuse the “A” input you could create a short or a ground loop.
I look forward to hearing more. Best