Make TextField text center.
Example:
TextField("分享见解，下一个八炸就是你...", text: $comment)
.font(home.fontFootnote)
.foregroundColor(.black)
.frame(minWidth: 0, maxWidth: .infinity)
.frame(height: home.defaultPadding*2)
.multilineTextAlignment(.center)
.background(Color("lightGray"))
.clipShape(Capsule())