How to implement one2many field on odoo 15 website form - odoo-website

Question

I have a custom module and i want to create a website form for my module. In the backend form the is a section where user enters service details through a one2many field. The form is to be made available to portal users on the website.How do i implement one2many field on the website so that the information can be recorded in backend??This is my backend form view
This is my website form.I've been able to do first part of form and need help with many2one
<template id="online_request_form">
<t t-call="portal.portal_layout">
<t t-set="breadcrumbs_searchbar" t-value="True"/>
<t t-call="portal.portal_searchbar">
<t t-set="title">Service Request</t>
</t>
<div id="wrap" class="oe_structure oe_empty">
<section class="s_website_form" data-vcss="001" data-snippet="s_website_form">
<div class="container">
<form action="/submit/request" method="post" enctype="multipart/form-data" class="o_mark_required" data-mark="*" data-model_name="" data-success-page="">
<input type="hidden" name="csrf_token" t-att-value="request.csrf_token()"/>
<table style="border:0px; width:100%%; background-color:#D6EEEE; margin-top:5%%;">
<group>
<tr>
<td>
<group>
<label class="col-form-label col-sm-auto s_website_form_label" style="width: 50%%" for="studio1">
<span class="s_website_form_label_content">Agency</span>
<span class="s_website_form_mark"> *</span>
</label>
<div class="col-sm">
<select name="agency" t-attf-class="form-control s_website_form_input" required="1">
<option value=""><i>Please Select</i></option>
<t t-foreach="agencies or []" t-as="agency">
<option t-att-value="agency.id">
<t t-esc="agency.name" />
</option>
</t>
</select>
</div>
</group>
<group>
<label class="col-form-label col-sm-auto s_website_form_label" style="width: 50%%" for="studio1">
<span class="s_website_form_label_content">Agent</span>
<span class="s_website_form_mark"> *</span>
</label>
<div class="col-sm">
<select name="agent" t-attf-class="form-control s_website_form_input" required="1">
<option value=""><i>Please Select</i></option>
<t t-foreach="agents or []" t-as="agent">
<option t-att-value="agent.id">
<t t-esc="agent.name" />
</option>
</t>
</select>
</div>
</group>
</td>
<td>
<group>
<label class="col-form-label col-sm-auto s_website_form_label" style="width: 50%%" for="studio1">
<span class="s_website_form_label_content"> IMDG Code / Un No.</span>
<span class="s_website_form_mark"> *</span>
</label>
<div class="col-sm">
<input id="imdg_code" type="text" class="form-control s_website_form_input" name="imdg_code" required="1"/>
</div>
</group>
<group>
<label class="col-form-label col-sm-auto s_website_form_label" style="width: 50%%" for="studio1">
<span class="s_website_form_label_content">Phone</span>
<span class="s_website_form_mark"> *</span>
</label>
<div class="col-sm">
<input id="phone" type="text" class="form-control s_website_form_input" name="phone" required="1"/>
</div>
</group>
</td>
</tr>
</group>
<tr>
<td>
<group>
<label class="col-form-label col-sm-auto s_website_form_label" style="width: 50%%" for="studio1">
<span class="s_website_form_label_content">Email</span>
<span class="s_website_form_mark"> *</span>
</label>
<div class="col-sm">
<input id="email" type="text" class="form-control s_website_form_input" name="email" required="1"/>
</div>
</group>
</td>
</tr>
</table>
<div style="width:200px; margin-top:2%%;" class="form-group col-12 s_website_form_submit" data-name="Submit Button">
<div class="s_website_form_label"/>
<button type="submit" class="btn btn-primary">Submit</button>
</div>
</form>
</div>
</section>
</div>
</t>
</template>
The template for website form.
#http.route('/service_requests', type='http', auth="user", website=True)
def service_request(self):
products = request.env['product.template'].sudo().search([])
agencies = request.env['res.partner'].sudo().search([])
agents = request.env['res.users'].sudo().search([])
values = {}
values.update({
'products': products,
'agencies': agencies,
'agents':agents,
'page_name': 'new_request',
})
return request.render("service_request.online_request_form", values)
Corresponding controller