She is finally coming sound a year and a half later after the intial injury. However that foot developed into a club foot. Can a club foot that is a horse isn't born with me trimmed back into a normally shaped hoof?
Yes, is the basic answer, but it depends is the more accurate one!
I believe it's very rare for horses to be born 'clubby', but it's usually something they develop from being right or left 'handed'(habitually having same foot forward when grazing), from body issues or from injury. So called 'contracted tendons'(actually tight muscles - tendons don't stretch/contract) can happen due to nutritional probs or injury/posture, so it's not either/or. Therefore I'd also work the hooves in conjunction with a good bodyworker, as 'upstairs' is strongly linked to 'downstairs'.
If she didn't start out clubbed, there's a very good chance that with a 'holistic' approach, her feet can get back to where they were pre-injury.
Whether or not the heels are able to be lowered enough, in the meantime I would also be using frog supports, to ensure the retracted heels get enough stimulation & don't get further contracted & weak from lack of use. This will help build their strength comfortably. Also ensure the toes on both feet aren't allowed to run away, and IME it's also common for the weighted 'pancake' foot to become run forward in the heel dept too.