⛖ How to Create the bidirectional Relationships!?

I tried to create bidirectional relationships by using this pattern (a)-[:]-(b) and also this one (a)<-[:]->(b).
but at the end result is direct to one part of the nodes from the first parenthesis to last one (a)-[:]->(b) any suggestion?

I have a graph with only some edges that are bi-directional. I am clueless to make cypher queries so that the resulting graph can I have a node with bi-directional edge