Does Apple provide a charger and lightning cable when you purchase a Mac?

If you are asking about the 27" iMac (Im guessing), see the following from https://www.apple.com/imac-27/specs/

Note that it does not use an external power adapter -- just a power cord.

iMac with 5K Retina display

In the Box

Magic Keyboard

Magic Mouse

Power cord

Lightning to USB Cable

Polishing cloth

According to the Apple document I referenced, it should (as would the Magic Keyboard or Mouse if you purchased it separately). If you have searched all of the packaging -- Apple seems very capable of hiding tightly curled cables from me. If not found, contact Apple Customer Service at 1-800-676-2775. See: https://www.apple.com/shop/help/returns_refund