The source – support.google.com
Soon, the Target CPA and Target ROI strategies will become customizable in other strategies as optional fields.
They can now be found in strategies such as “Maximum Conversions” and “Maximum Conversion Value”.
This update will only affect campaign-level strategies, with portfolio bidding strategies not changing until next year. You can find out if the tCPA and tROAS additional fields are active in the Bid Strategy Type column.