Transactions in unit of work pattern for EF core

I am using unit of work pattern for EF core database first approach in my application. I have also implemented database transactions in unit of work class. For e.g.

public class UnitOfWork : IUnitOfWork
{
    private myDBContext _dBContext;
    public IDatabaseTransaction BeginTransaction()
    {
        return new EntityDatabaseTransaction(_dBContext);
    }
}

Now I have handlers for different operations and each handler have dependency injection of unit of work. Inside handlers I am using transactions for DB operation. For e.g.

public class Operation1Handler : BaseHandler
{
    IUnitOfWork _unitOfWork;
    public Operation1Handler(IUnitOfWork unitOfWork)
    {
        _unitOfWork = unitOfWork;
    }

    public override void Handle()
    {
        using(var _trans = _unitOfWork.BeginTransaction())
        {
            //some code
            _unitOfWork.Entity.SaveAsync();
            _trans.Commit();
        }
    }
}

Now this handler is getting called in a WebAPI method like

public void MyAPI()
{
    var handler = new Operation1Handler();
    handler.Handle();
}

So far this is working perfectly fine. Now my problem is I have to call 2 different handlers in a WebAPI method which will do different DB operations. But I want all operations under both handlers to be transaction compliant i.e. if operation of handler 2 fails, operation of handler 1 should also rollback.

public void MyAPI()
{
    var handler = new Operation1Handler();
    handler.Handle();

    var handler2 = new Operation2Handler();
    handler2.Handle();
}

Can anyone help me to achieve this.