I plugged in my phone USB-C (can access via desktop) - but the folder was empty.
It’s ridiculous.
I use Gwayun for downloading music, and that goes to /Downloads/Gwayun.
I don’t understand why Kasts has to hide these files!
PocketCasts is slightly annoying, but the files CAN be found:
EXFAT-256/Android/data/au.com.shiftyjelly.pocketcasts/files/PocketCasts/podcasts/
… though they have gibberish names, which is almost as annoying as keeping them hidden.