What accusations has the United Nations made against Sheikh Hasina's administration?

According to Shafiquull Alam, Press Secretary to Mohammed Yunus, the Office of the United Nations High Commissioner for Human Rights (OHCHR) has formally accused Sheikh Hasina's administration of committing crimes against humanity. This serious allegation represents one of the gravest charges that can be levied against a government under international law. Following this report and additional accounts from various rights groups, international pressure has reportedly intensified on India to return the ousted Prime Minister. The interim Bangladesh government appears to be leveraging these UN accusations as part of their justification for seeking Hasina's extradition from India to face accountability for these alleged crimes.