After a root canal, can you still feel the tooth if you tap on it?

Yes: Immediately after a root canal the tooth may be sore and tender to touch but over time it will resolve. Taping on a tooth that has a root canal should feel like tapping on any other tooth.

Yes you can: A tooth has a double nerve supply (innervation) the internal in the pulp, and the external , supplying the surrounding tissue (periodontium). Root canal therapy cleans and removes tissue from the pulp space, so the tooth will not respond to hot or cold, but it will still feel pressure to bite or tap.

Yes: The tissue that is responsible for feeling tapping is called the periodontal ligament. It isn't removed when you have a root canal treatment.

Many Possibilities: Pain can come from infection or trauma. In the case of prior root canal treatment it is possible you have a persistent infection. If the pain is immediately after the treatment it may be traumatic. I suggest you seek the care and advise of the dentist that previously treated you to determine the cause of your specific case. Good luck.