query_cache_type on mysql galera cluster
No Query Cache on Galera Cluster.  It is much to complex to keep it in sync among the nodes.

Instead, depend on the buffer_pool, etc, to make the queries "fast enough".

In 95+% of Production systems, the Query Cache (or any other caching) is a waste.  Why?  Because data is flowing in so fast that the cache must be all-too-frequently purged.

Perhaps your application is mostly read-only?  That might be a justification for a read cache.

Perhaps your read queries are so slow that you have turned to caching as a 'fix'.  Instead, let's look at the queries.  Often, there is a simple solution (such as a composite index) to speed up reads to the point where caching is unnecessary.