I need to be able to use a variable in an expression to transfer from one flow to another.
Currently this is not supported. However I found on another thread that you can achieve this by doing a transfer to number with the value of sip:flowname as the phone number and the transfer will work. I have confirmed that it does currently work.
I need to know if this is a supported feature that is just not documented, or is it not supported and something that could stop working without any notice.