While ​​​​​​ some 752 have been available SFO-BOS, it has not been listed as a ps flight for years (as this thread chronicles) and some flights were 739s (I did both 752 and 729 in 2022. Also, UC access did continue until recently as it was sold as Business but other accepts of ps were not offered . So it was an odd ball, neither fish or fowl.

As for UC access for an older purchase, what term is your ticker .. business or first, that should provide a strong hint