web3/views/view_web3_index.xml

<odoo>
    <record id="web3_index_form_view" model="ir.ui.view">
        <field name="name">web3.index</field>
        <field name="model">web3.index</field>
        <field name="arch" type="xml">
            <list string="Web3 Index" create="0">
            </list>
        </field>
    </record>

    <record id="action_web3_index" model="ir.actions.act_window">
        <field name="name">Web3 Index</field>
        <field name="res_model">web3.index</field>
        <field name="view_mode">list</field>
    </record>

    <menuitem id="menu_web3_index" name="Web3 Index" action="action_web3_index" sequence="3"/>
</odoo>