odoo16/addons/portal/wizard/portal_share_views.xml

<?xml version="1.0" encoding="utf-8"?>
<odoo>
    <record id="portal_share_wizard" model="ir.ui.view">
        <field name="name">portal.share.wizard</field>
        <field name="model">portal.share</field>
        <field name="arch" type="xml">
            <form string="Share Document">
                <p class="alert alert-warning" attrs="{'invisible': [('access_warning', '=', '')]}" role="alert"><field name="access_warning"/></p>
                <group name="share_link">
                    <field name="res_model" invisible="1"/>
                    <field name="res_id" invisible="1"/>
                    <field name="share_link" widget="CopyClipboardChar" options="{'string': 'Copy Link'}"/>
                    <field name="partner_ids" widget="many2many_tags_email" placeholder="Add contacts to share the document..."/>
                    <field name="note" placeholder="Add a note"/>
                </group>
                <footer>
                    <button string="Send" name="action_send_mail" attrs="{'invisible': [('access_warning', '!=', '')]}" type="object" class="btn-primary" data-hotkey="q"/>
                    <button string="Cancel" class="btn-default" special="cancel" data-hotkey="z" />
                </footer>
            </form>
        </field>
    </record>

    <record id="portal_share_action" model="ir.actions.act_window">
        <field name="name">Share Document</field>
        <field name="res_model">portal.share</field>
        <field name="binding_model_id" ref="model_portal_share"/>
        <field name="view_mode">form</field>
        <field name="target">new</field>
    </record>
</odoo>