The Rollei films are supplied my Maco. I think Maco just bought some APX 25 master rolls from Agfa to cut them. So I think (I can not vouch for it) that Rollei Pan 25 is actually APX 25.
Of course that will run out at some point.
The Rollei Pan 25 is supposed to be made in Germany. Maco do not produce any film or paper, they just market it and in some cases they cut and spool it. There are (were) not that many film coating plants in Germany, and Maco sold some other Agfa products. Which speaks for the assumption that Rollei Pan 25 is just Agfa APX 25.
Maybe someone else can confirm this.
But it wouldn't hurt to just buy a roll and see if it behaves like the beloved APX 25, right?