Setting th:field from another variable in Thymeleaf - thymeleaf

Question

I have this code below where I try to set a field with a value from the viewModel. I tried to follow this and this by removing th:field and adding only th:value + html name and id but I still get null in the model. Not really sure what I am doing wrong.
<tr th:each="r, rowStat : ${roomViewModels}">
<td th:text="${r.type} ">
</td>
<td th:text="${#numbers.formatCurrency(r.price)}"></td>
<td>
<input class="form-control" type="number" min="1" max="10"
th:field="*{roomType[__${rowStat.index}__].numberOfRooms}"
id="numberOfRooms" name="numberOfRooms"/>
<input th:value="${viewModel.rooms[__${rowStat.index}__].getType()}"
name="type"
id="type"
type="hidden"/>
Controller
#PostMapping("/create-booking")
public String createBooking(#Valid BookingBindingModel bindingModel, BindingResult br,RedirectAttributes rAtt, #AuthenticationPrincipal CustomUser user,
#RequestParam(value = "id") Long id){
if (br.hasErrors()) {
System.out.println(br);
rAtt
.addFlashAttribute("bindingModel", bindingModel)
.addFlashAttribute("org.springframework.validation.BindingResult.bindingModel", br);
return "redirect:booking-form";
}
Controller:
#GetMapping("/booking-form")
public String bookingForm(HttpServletRequest request, Model model) {
Cookie[] cookies = request.getCookies();
long id = 0;
for (Cookie cookie : cookies) {
if (cookie.getName().equals("id")) {
id = Long.parseLong(cookie.getValue());
break;
}
}
AccommodationViewModel viewModel = this.accommodationService.findById(id);
List<RoomViewModel> roomViewModels = viewModel.getRooms();
model
.addAttribute("viewModel", viewModel)
.addAttribute("roomViewModels", roomViewModels);
return "booking-form" ;
}
ViewModel:
public class AccommodationViewModel {
private Long id;
private String name;
private String category;
private String city;
private String address;
private Integer postalCode;
private String imageUrl;
private List<RoomViewModel> rooms = new ArrayList<>();
private String type;
private String cancellationPolicy;
private String paymentPolicy;
private LocalTime checkInTime;
private LocalTime checkOutTime;
Binding Model:
public class BookingBindingModel {
#Future
#DateTimeFormat(pattern = "yyyy-MM-dd")
#NotNull(message = "Check out date is required!")
private LocalDate checkOut;
#NotNull(message = "Number of rooms is required!")
private List<RoomBindingModel> roomType;
#NotNull(message = "Number of people is required!")
private Integer numberOfPeople;