@teravn/onui/src/@core/theme/overrides/alert.ts

The React UI component library is based on MUI

const Alert = () => {
    return {
        MuiAlertTitle: {
            styleOverrides: {
                root: { fontWeight: 600, fontSize: '0.875rem', lineHeight: '1.25rem' }
            }
        }
    }
}

export default Alert