Playing the TotK ROM via emulators like or Ryujinx offers significant visual upgrades over the native Switch hardware, though it requires a high-end PC for optimal results.
If you do not physically own the game and the hardware to dump it, searching for is asking for legal trouble.
While Tears of the Kingdom remains a technical marvel that runs natively on the Nintendo Switch, the demand for ROM files stems from players seeking enhanced performance via PC emulation. However, obtaining these files through unauthorized channels constitutes software piracy and carries significant legal and ethical implications. For the vast majority of players, the intended experience is strictly on Nintendo Switch hardware.