Okay, I seem to now be able to answer my own question…
In the below-linked “.gov.za”, “KNOW YOUR UIF RIGHTS 2022.pdf” document, on page 5, section 3, it clearly says the following:- “In case of voluntary severance package or early retirement, a UI 2.11 form is required”.
IE. so at least in this instance, it seems to clearly indicate that it is possible to receive UIF compensation, while on early retirement!
Link to .gov.za “KNOW YOUR UIF RIGHTS 2022.pdf” document:- “https://www.labour.gov.za/DocumentCenter/Publications/Unemployment%20Insurance%20Fund/KNOW%20YOUR%20UIF%20RIGHTS%202022.pdf”