regex = /[\u{0660}-\u{0669}]+(\u{066c}[\u{0660}-\u{0669}]+)*(\u{066b}[\u{0660}-\u{0669}]+)?|[0-9]+(,[0-9]+)*(\.[0-9]+)?/ug
replacer = i => i.replace(/\u{066c}|,/ug, '').replace('\u066b', '.')
                    .replace(/\u{0660}/ug, '0')
                    .replace(/\u{0661}/ug, '1')
                    .replace(/\u{0662}/ug, '2')
                    .replace(/\u{0663}/ug, '3')
                    .replace(/\u{0664}/ug, '4')
                    .replace(/\u{0665}/ug, '5')
                    .replace(/\u{0666}/ug, '6')
                    .replace(/\u{0667}/ug, '7')
                    .replace(/\u{0668}/ug, '8')
                    .replace(/\u{0669}/ug, '9')

"текст_١٢٣٬١٢٣٬٤٥٦٬٤٥٦٫٧٨٩_тексттекст123текст123,456текст123,456.789текст123.456789тексттекст123текст123456текст123456.789текст123456.789тексттекст10,00,00,00,00,000.123456"
.replace(regex, replacer)