The primary issue in this format is that no one here can read or review the terms of the trust.
Regardless, if the properties are still held in the trust, then they are not part of the estate. In any event, if the properties are sold by the trust, then it is likely that a Form 1041 will be required to be filed (unless this is somehow a grantor trust, which would be highly unusual).
See https://www.irs.gov/instructions/i1041#en_US_2021_publink1000285943
You should absolutely consider contacting a local tax professional and/or local legal counsel for this matter.
See https://taxexperts.naea.org/listing/service/estates-gifts-trusts
See also https://taxexperts.naea.org/listing/service/estates-gifts-trusts
