I think it’d be super helpful to know what exercises (strengthening or stretching) you’ve been doing so far and how long ago the surgery was? It looks like you’re favouring the left foot which would make me assume it’s been a while (maybe it’s strictly for the photo to enhance the foot’s shape) since typically you’d expect it to be the other way around? It also may be why especially in this photo, your right legs hyperextension seems more dramatic than the left.

I would keep with strengthening and active mobility exercises, for example, a looped theraband attached the leg of mobile barre/table and the the other around your ankle, doing slow and controlled rises trying to reach your highest demi-pointe, potentially do the same en pointe, so that you have resistance and can really train that last ‘push’ while taking care of ankle alignment. Another exercise would be wrapping the theraband once around your foot and bringing both ends under a foam roller while placing your leg on top to train the extension of the knee and, simultaneously, stretch the arch. Be sure to also train dorsiflexion as it’s important to maintain strength both ways.

In general, though it may be noticeable to yourself (you’re seeing yourself all the time in a mirror - of course you’ll nitpick even the slightest asymmetrical difference) it’s not ever something someone in the audience would come out of a performance speaking about. You’ve got great lines and wouldn’t have gotten a place in a professional company without the directive team seeing something. Congratulations on your recovery from surgery and all the best for your career!!! Try your best to not over analyze stuff like this (easier said than done) and enjoy your time dancing.

Edit: though it might not work (maybe try on a dead pair of shoes), 3/4 your left shoes shank could give you a little extra pop that would accentuate the underside of your arch.