Hard to answer as a woman because women are a little less visual than men. Other things can sort of compensate such as great character, intelligence, humor etc. But having said that, even for a woman, if there is an unexplainable 'ick' factor, there's no getting over that. For men though I think those aforementioned qualities are are on par with attraction and cannot be replaced by attraction.
The situation sounds very unfortunate and I do think that sometimes attractiveness is not emphasized enough in marriage conversations. It's definitely an important part of marriage. Not really sure what OP should do. There was a video I saw once where the guy was talking about how when he traveled to an extremely conservative country where all the women were covered in niqab+abaya, and he was there for awhile so basically didn't see any women for a period of time, his level of attraction to women in general skyrocketed. When he got back home to his western country, every little thing about any woman was extremely arousing. I'm not accusing you OP but maybe by lowering your gaze more and being more careful about how much women you see on a daily basis can have a positive impact on your attraction to your wife? Of course I know this is extremely hard as women walk around practically naked these days, especially with the warmer weather, and it's almost impossible for a man to live his life normally while also not interacting with women who are dressed to allure men :/
Edit: also I'd like to add that I am more than likely not really my husband's "type." He's never said that directly but I can guess what his type is based on little comments and it's different than me. Despite that, we have a good marriage and have been married 10 years. He is very careful about his gaze and looking at women. That could have to do with it. And one last thing, you could have a talk with your wife about anything she can do to increase her appeal. Sometimes Muslim women are very shy and it takes time and coaxing to bring out their non shy side that is supposed to be with the husband. Maybe certain outfits, behavior, makeup, or hairstyles can have a positive effect... worth looking into.