Not passing paramater value with @> PostgreSQL operator

Using the Dapper ORM I'm constructing the following query to get a specific order from my PostgreSQL datastore:

$@"
    SELECT * FROM ordertable
    WHERE orderjson @> '{{""Lines"":[{{""SKUID"": ""@SkuId"" }}]}}'
";

Passing 123456-0 into the parameter @SkuId this construction should result into the following query

SELECT * FROM ordertable WHERE orderjson @> '{"Lines":[{"SKUID":"123456-0"}]}'

Dapper seems to ignore the paramater @SkuId as my query looks like

SELECT * FROM ordertable
WHERE orderjson @> '{"Lines":[{"SKUID": "@SkuId" }]}'

How do I use this @> operator ?

The issue provides no repository file, test, or entry point. Start by reproducing the shown Dapper query against PostgreSQL and inspect how Dapper parses @SkuId alongside the @> operator; done means establishing whether the parameter can be bound and documenting or fixing the supported syntax.