While it would be technically feasible, it is really not a good idea and is unsupported - it would also likely tank the clusters performance:
"Can I mix all-flash disk groups and hybrid disk
groups in the same host or cluster?
Mixing disk group types (all-flash and hybrid) is not supported. This complicates operational aspects
such as balancing workloads, synchronizing components, and capacity management. All hosts in the
cluster must be configured with the same type of disk groups (hybrid or all-flash)."
If you have an AFA setup than your Cache device will be only used for "buffering" the writes.
If you have an Hybrid setup than your Cache device will be used for "chaching" the read and writes.
So the capacity drives have to be HDD or SSDs but not in a mixed.