When Hitler took the rest of Czechoslavakia, Poland and Hungary took pieces of the country with German acquiescense.
Yup.
The Hungarians continued as German allies till late in the war.
The Poles didn’t have that option, for reasons of geography and Nazi racial ideology. It’s quite possible the Polish government would have been glad to collaborate if they’d been allowed to. They might have been quite happy to invade USSR along with Germany, as the Romanians and Hungarians, among others, did.