@beldar I don't notice tearing with SNES, NES, Genesis, Neo Geo, or Playstation. But I do notice it on Mortal Kombat 2 arcade which does run at a funky refresh rate. I also noticed it very badly with lr-flycast. Soul Calibur, MKGold, and NFL Blitz all had really bad tearing.
Please do not post a support request without first reading and following the advice in https://retropie.org.uk/forum/topic/3/read-this-first