Cafcass instruct the ICFA to be completed. It's carried out by what's still widely known as a contact centre. Cafcass set the parameters - duration and involvement levels of the contact centre.
It's unlikely that Cafcass have requested the mother's directions.
This is why I suggested that you contact the Cafcass representative because they are running the show and they are being told how the process is unfolding.
The point of the ICFA is to build/rebuild your relationship so cutting it short is pointless. At the end of the process Cafcass will submit an addendum to the S7.
For mine, thankfully I won't be in a contact centre, it will be in the community with said ICFA facilitator observing.
But this has all been incredibly rushed, they will spend 1hr with our child then immediately after that there are 2 sessions.
There has been no reintroduction or preparation work at all.
The mother will then pull the plug again then this ICFA has been a complete waste of time.