And will there be an action figure? All the other characters seem to have one.
Hiro Hamada's tiny two-faced robot was called Megabot. Its modular design made it very flexible and distinctive.
As to whether or why there isn't an action figure, perhaps Disney didn't think Megabot was distinctive enough or interesting enough to create one.
Generally, toy manufacturing is an expensive business and the ten most popular main characters seem to have gotten an extensive treatment. I imagine if enough requests are made for them, Disney will be only too happy to comply if they can make money producing them in volume.