Mettere mano al bundle minificato è da pazzi, conviene fare uno script custom che si esegue subito dopo.

codice:
 <script src="app.min.js"></script>
    <script>
        window.addEventListener('load', () => {
            const inputOnchange = document.querySelectorAll('input[onchange]')
            const inputReadonly = document.querySelectorAll('input[readonly]')

            function fixReadOnly() {
                Array.from(inputReadonly).forEach(input => {
                    input.value = String(input.value).replace(',', '.')
                    input.value = Number(input.value).toFixed(2)
                })
            }
            function formatInput(e) {
                fixReadOnly()
                e.target.value = String(e.target.value).replace(',', '.')
            }
            Array.from(inputOnchange).forEach(input => {
                input.addEventListener('change', formatInput)
                input.value = String(input.value).replace(',', '.')
                fixReadOnly()
            })
        })

    </script>