account-reconcile/account_reconciliation_widget/views/account_bank_statement_view.xml

<?xml version="1.0" encoding="utf-8" ?>
<odoo>
    <data>
        <record id="view_bank_statement_form" model="ir.ui.view">
            <field name="name">account.bank.statement.inherit.view.form</field>
            <field name="model">account.bank.statement</field>
            <field name="inherit_id" ref="account.view_bank_statement_form" />
            <field name="arch" type="xml">
                <xpath expr="//button[@name='button_post']" position="before">
                    <button
                        name="action_bank_reconcile_bank_statements"
                        string="Reconcile"
                        type="object"
                        class="oe_highlight"
                        attrs="{'invisible':['|','|',('all_lines_reconciled','=',True),('line_ids','=',[]),('state', '!=', 'posted')]}"
                    />
                </xpath>
                <xpath expr="//field[@name='date']" position="after">
                    <field name="accounting_date" groups="base.group_no_one" />
                </xpath>
            </field>
        </record>

    </data>
</odoo>