This is an example, which shows the UoM after the product price in the website_sale list/kanban view and in the product detail view, it might give you the idea:

 <template id="tw_website_sale_show_uom.products_item" inherit_id="website_sale.products_item" name="Products Item Show UOM">
     <xpath expr="//span[@itemprop='priceCurrency']" position="after">
         <t t-if="product.uom_id.name and product.uom_id.id !=1">
           <label>/</label>
           <span t-field="product.uom_id.name" style="white-space: nowrap;"/>
         </t>
     </xpath>
 </template>
 <template id="tw_website_sale_show_uom.product_price" inherit_id="website_sale.product_price" name="Product Price Show UOM">
     <xpath expr="//span[@itemprop='priceCurrency']" position="after"> 
       <t t-if="product.uom_id.name and product.uom_id.id !=1">
         <label>/</label>
         <span t-field="product.uom_id.name" style="white-space: nowrap;"/>
       </t>
     </xpath>
 </template>