ePSXe (if you mean this one) is old and outdated (I found the pSX one and it’s also quite old).
I only support DuckStation.
As for the PS2 - it’s confirmed to work on it, but only when running with CD. POPSTARTER/OPL will not work because they use a different way of PS1 emulation on PS2 and I don’t have strength to try to support this, sorry…