Can I send my key fob and mirror I bought a new uem and disposed of the old one without knowing my key fib connects to it

I really want the keys work again anything I can do?

My uem was replaced and everything works except the key fob buttons? Will I need a new uem and key fobs or just a new key fob and uem update? Or rather just an update and old key fob will work again? I already through away the old mirror and yes the fob worked prior to mirror replacment