Im running test automation for app on iOS and Android, have to scan QR code from email(registration reason). So:
deps:

desired_capabilities = {
        'platformName': 'iOS',
        'udid': f'{set_udid}',
        'appium:automationName': 'Flutter',
        'app': f'{app_path}',
        'appium:bundleId': f'{bundle_id}',
        'xcodeOrgId': 'L8JZ6843HL',
        'xcodeSigningId': '0FB7117FD82DED81C35334BB65E227214DBC4762',
        'appium:newCommandTimeout': 2000,
        'appium:clearSystemFiles': True,
        'fullReset': True,
        'appium:autoAcceptAlerts': True
    }

def desired_capa_android(set_udid, app_path):
    """Capabilities for Android device"""
    desired_capabilities = {
        'platformName': 'Android',
        'udid': f'{set_udid}',
        'appium:automationName': 'Flutter',
        'appium:appPackage': Constants.ANDROID_APP_NAME,
        'appium:appActivity': '.MainActivity',
        'appium:realDevice': True,
        'appium:newCommandTimeout': 1000,
        'appium:autoGrantPermissions': True,
        'appium:nativeWebScreenshot': True,
        'appium:adbExecTimeout': 120000,
        'appium:clearSystemFiles': True,
        # 'appium:fullReset': False,
        'androidInstallTimeout': 900000,
        'appium:app': f'{app_path}'
    }

function to get qr code from mail:

def get_qr_code_from_email_body(email_body):
    soup = BeautifulSoup(email_body, 'html.parser')
    manual_code_div = soup.find('div', style=lambda value: value and 'word-break: break-all' in value)
    if manual_code_div:
        return manual_code_div.text.strip().replace('n', '')

function to simulate qr reader when camera is open when test is running:

def simulate_qr_scan(qr_code, udid=None):
    command = [
        'xcrun', 'simctl', 'io', 'booted', 'simulate', 'barcode', '--type',
        'qr', qr_code
    ]
    try:
        subprocess.run(command, check=True)
    except subprocess.CalledProcessError as e:
        print(f'Failed to simulate QR code scan: {e}')

Result of this function is nothing. Nothing happend and tests are failing. Anyone can show me what im doing wrong?