With the ON1 Photo RAW 2023.1 update, the Healing Brush tool gets a major upgrade. You could already move the source area around to find the best match, but now you can transform the repair to flip it, scale it up or down or rotate it to better match the area you’re repairing.
Cloning
Using a special clone stamp tool to copy pixels from a nearby area of an image to cover up an unwanted object or blemish. Cloning is something of an art, and some programs now offer simpler ‘content aware’ object removal.