I'm not sure that's how transfers work.
If two different clubs have bid that means two different clubs want to buy him, nothing more.
Possibly someone, possibly Wissa's agent, has nudged them into doing so, but equally one might just be copying the other's homework.
On the other hand PG has said in the past that every player is available if the money is good enough (i.e. silly money, he said cheerfully any one of our players could leave for say £200m if that was what someone somehow wanted to offer) so on that basis he is of course "on the market". But I think we'd be talking very silly money for selling a forward at this stage of this window, with Toney presumably close to leaving.