Trainable Activity Availability in UiPath

I was trying to process 5 different invoices through my Document Processing Workflow but seems like Bot is having hard time to extract exact line items and PO Number from them. PO Number is one field not getting extracted at all from any of the 5 invoices.

Do we have a Trainable Activity available now in UiPath which can Train my model to extract those from specific points using Machine Learning or it is yet to be released??

**I am using Train Extractor Scope but after that i don’t have Trainable Activity available to put in there??

Thanks,
Ayush