C# [UseFiltering] with contains and case insensitive

I am trying to use hotchocolate and MongoDbFiltering in c#. I need to be able to query for a name without worrying about case. I was able to create an index with collation and that works for name eq string, but I need the name field to contain string.

GraphQl Query example that works with eq

users(where:{name:{eq:"elmer fudd"}})
{
   nodes { id name} 
}

What I need is

users(where:{name:{contains:"elmer"}})
{
   nodes { id name} 
}

server side looks like this

Collection.Find<User>(filter, new FindOptions { Collation = new Collation("en", strength: CollationStrength.Secondary) }).AsExecutable();

Thanks!

Did you manage to find a way around it or a solution?