Some time ago, iOS introduced the contact poster. I set one up for me but I want to delete it but I can't figure it out. How do I do that? I'm running iOS 26.0.
I ended up using iCloud contacts on the web - export the contact, delete it, re-import it. It doesn't import the contact poster, as contacts on the web doesn't know what they are. I think you can do the same on a laptop.
One of them (it's a while since I did this!) also trashes the contact icon which I wanted to keep, so experiment with the web and MacOS version of contacts to see which works best for you.