Is Invisalign Safe for a Crowned Tooth with Root Canal?

Forces applied to the crowned tooth affect the bone around the tooth and not the crown. If the crown came off, that would actually be a good thing, as it would show that the retention from the cement was not very good and would create an opportunity to put it on better.
The forces are fairly gentle, so risk of fracture is low.

Invisalign is safe for crowns wih root canal as the orthodontic forces on the tooth affect the periodontal ligament and bone around the tooth. If that front tooth had a crown and root canal, due to a prior accident or some trauma, the doctor may want to move it slower and watch it more closely as one must take caution when moving a tooth that has been previously traumatized.

Yes it is safe to move a tooth that has a root canal. The forces on your teeth are gentle and should not cause any issues. There is always a risk with any root canal treated tooth that it could have root resorption, but that is very unlikely and could occur with or without Invisalign.
I think you are safe to proceed with getting a beautiful smile!