Set difference for jsonb

The *hstore* type in Postgres provides an [operation to calculate the set difference](https://www.postgresql.org/docs/14/hstore.html#HSTORE-OP-TABLE) (EXCEPT) of two records. Is there something similar for jsonb? The best I've got is SELECT * FROM jsonb_each('{"a":1, "b":2}'::jsonb) EXCEPT SELECT * FROM jsonb_each('{"a":1}'::jsonb), but I don't know how to convert it back to jsonb. I want to use this to calculate the difference (the changed values) between OLD and NEW in a trigger.