Whether you need it probably depends on your climate and your house.

Water in pipes inside a house's "thermal envelope" is presumably around 72 deg. F. I wash my hands with "cold water" without wincing. Tap water strikes me as tepid if I drink it without ice.

If your pipes run through an outside wall in Canada, it might be a different story.

If you do need warmer water, and the bidet heats it, you probably just need an electrician to fish a wire and add a receptacle. That's not outrageously complex, usually, but I tend toward calling a professional for anything behind the walls.