Couple of thoughts: First of all, nobody does really notice your footwear much with a long dress unless you make a point to have folks look at it. One thing you can do is wear a more stylish pair for photos and/or the ceremony and then switch into your orthos afterward if you still want to have a stylish shoe moment. By the reception especially nobody is going to think twice about your shoes. I would try to avoid the black and opt for something white to help camouflage the shoes a little so they don’t stick out by contrasting the dress. I’ve looked through the links people have shared here and I’ve found a few pairs I think would be cute! Or as others have suggested, embrace sneakers and do a cute pair of vans or something like that. And lastly I know you didn’t post looking for input on the plantar fasc but I suffered for years and then was able to finally kick it by looking up stretches and using this brace
My PF tips:
I just started using one about a month ago. My sister already had one she was not using so she gave it to me. It's been working well enough so I have not tried any others yet.
It's an Ace brand: https://www.amazon.com/ACE-Fasciitis-Americas-Satisfaction-Guarantee/dp/B005YU8XLO/