Can I track volume on the training plan so the weights and total volumes that clients are entering as they complete each workout so we can see they are accumulating week to week?

Yes, you can track volume on your client's dashboard. Go to clients> all clients> click desired client profile. Under the log, you can see the total volume for each exercise. You can also see individual weights progress.

You view the logged workouts every 3,5 or 7 days. This can be adjusted in "Configuration" > General settings > Number of days to show in logs