redis_version:6.2.14
module:name=ReJSON,ver=20409,api=1,filters=0,usedby=[search|graph],using=[],options=[handle-io-errors]
module:name=timeseries,ver=10814,api=1,filters=0,usedby=[],using=[],options=[handle-io-errors]
module:name=graph,ver=21012,api=1,filters=0,usedby=[],using=[ReJSON],options=[]
module:name=search,ver=20620,api=1,filters=0,usedby=[],using=[ReJSON],options=[handle-io-errors]
module:name=bf,ver=20409,api=1,filters=0,usedby=[],using=[],options=[]

When running following command:
JSON.MSET doc1 $ '{"a":1}' doc2 $ '{"f":{"a":2}}' doc3 $ '{"f1":{"a":0},"f2":{"a":0}}'

I get this returned :

This is directly the command from the Redis JSON.MSET Command Documentation.