Attraction has nothing to do with physical appearance. One doesn’t need to be physically attractive for their partners to feel attraction. Attraction is much more complicated than noticing someone’s good looks. Plenty of people are attracted to their partners but don’t objectively find them gorgeous. Attraction is way more complex than that

If you aren’t feeling attraction and don’t want sexual relationship with your partner, then it’s all fine as long as they feel the same. If you mutually aren’t attracted to each other and agree upon platonic partnership, then it’s all good. Does your partner tell you they are ok with all this? If yes then there are no issues.