Superman also saved the Omniverse by vibrating a single planet saving another planet... that somehow saved the entire Omniverse...Absorbed the Mageddon Warhead enough energy from (the anti sun) to disarm the Mageddon Warhead before it detonated that could destroy half the Galaxy, Moved indeterminate # of gears that weren't gigantic, contrary to popular belief, within Mageddon (he moved the engines and with it the whole thing).
held a mini-black hole in his hands, which is a feat he shares with... Havok
Closed an dimension rift with his hv along with blasts from Orion, that would have destroyed some planets and more because emerging into the "true world" destroys them.
Pulled a planet back into it's orbit (hal gave him the construct like harness)
He survived being caught in a collision of new genesis and apokolips without a scratch (though shortly koed) and got KTFO
Took on multiple -Imperiex probes (team wreckers, high herlad-trans level, Carver online *lowballing mode on, note: leave out the context to lowball*). several of which proved formidable, several of which... did not
Split the ocean with a scream/HV.
Destroyed two moons and got KTFO in one instance. Scarred another.
Fought pre-crisis Superman-2 who was nowhere near pre-Crisis levels anymore to a standstill, altering reality with his punches (The Multiverse was in flux, still they altered it not randomly but about their lives).
Flew through a red sun at incredible speeds and (even though there was a lot or knite around him) beat SBP (who too was depowered but immune to knite).
Lifted "half of infinity" two times 😂 x10.
Used his HV to heat up the entire earth (his HV was also recoded to be hotter then the sun could not be measured by jobber DC scientists, while stars can)
Escaped the gravity of a black hole.
Moved Earth with MM and WW.
Took blasts capable of destroying Earth three times over. ?????????
Defeated Darkseid more then once, who is the an embodiment of Evil. And though this were mostly Avatars, those were team wreckers and at least trans level.
Took a million nuclear blasts point blank and was only koed (this was still a weaker but amped version then current supes).
Survived a Supernova.
Closed Temporarily sealed a rip in reality temporal rift with static electricity caused by rubbing his bare hands together.
Survived an Sun-Eater Explosion implosion, designed so the surging power would collapse into the center...(byrne era iirc, so weaker)
Could tell flash an long story, while Flash was eating, while the earth around them was frozen in time (this is his speed). which seemed to stretch 1 second into 10 minutes, making him... 600x human speed... awesome???
Superman always had ridiculous feats, though people tend to forget overblow and sensationalize them because the lowballing highballing is more popular over the boards and seems to count more.