odoo16/addons/payment_demo/data/payment_provider_data.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo noupdate="1">

    <record id="payment.payment_provider_demo" model="payment.provider">
        <field name="code">demo</field>
        <field name="inline_form_view_id" ref="inline_form"/>
        <field name="token_inline_form_view_id" ref="token_inline_form"/>
        <field name="allow_tokenization">True</field>
    </record>

</odoo>