RSS Feed only showing latest post

Have you tried:

– deactivating all plugins to see if this resolves the problem. If this works, re-activate the plugins one by one until you find the problematic plugin(s).

– switching to the default theme to rule out any theme-specific problems.

– resetting the plugins folder by FTP or PhpMyAdmin. Sometimes, an apparently inactive plugin can still cause problems.

FWIW, I can still see your cache plugin running when I check your feed file.

EDIT: After doing what esmi suggested above, also try:

Go to dashboard > Settings > reading and check the number of syndication feeds you have set. Most probably you might have set it to 1. Reset it as five or ten as you may like to have.

Thanks for your advice. Tried everything but still no good…