Do I have the right as a beneficiary/co-owner to attend the closing of the sale of real property that is the main asset of my mother's estate?

My sister, the executor, has mismanaged the estate. I will not go into her many acts and omissions of malfeasance, but it resulted in the house being sold at a loss, much of which was avoidable. It's hard to get info from her. I would like to be -quietly- at the closing on the sale/purchase of the family home. I know that I could get the details I want by suing for an accounting in the Surrogates court, but I want to know sooner. I won't make trouble, even though she allowed the Estate to be plundered by another sister. There's a HECM, and $240,000 has been spent in 2 years for an old lady with adequate income, and property taxes are overdue. Maybe I should get an attorney for Surrogate's court proceedings.