Fact Sheet for Voters in Long-Term Care Facilities, issued by the PA Department of State in August 2022 (updated September 2024) , is available as a PDF and addresses issues for those voters living in a long-term care facility.

Specific information pertaining to the need for a designated agent. From page 2:

An individual may serve as a designated agent for only one voter unless the relevant voters live in the same household. A “household” for the purpose of designating an agent does not include a long-term care facility. This means that each resident in a LTCF [Long term Care Facility] who is unable to return their own voted ballot due to a disability must designate a different agent. However, a couple sharing a room or apartment within a facility may be considered members of the same household. (emphasis added)

As an alternative to designating an agent to return voted ballots, a facility may arrange for residents to deliver their own ballots to a United States Postal Service mailbox, the county elections
office, or another drop-off location designated by the county board of elections.