Boa tarde, Fernanda

Talvez o exemplo abaixo possa te servir, dê uma olhada:

function run(){
    function getRandomNumber(min, max) {
        return Math.floor(Math.random() * (max - min + 1) + min);
    }

    function generateRandomSequence(length) {
        let sequence = '';
        for (let i = 0; i < length; i++) {
          sequence += getRandomNumber(0, 9);
        }
        return sequence;
    }

    function generateFormattedDateString() {
        const currentDate = new Date();
        const year = currentDate.getFullYear();
        const day = currentDate.getDate().toString().padStart(2, '0');
        const month = (currentDate.getMonth() + 1).toString().padStart(2, '0');
        const randomSequence = generateRandomSequence(6);

        return `${year}.${day}${month}${randomSequence}`;
    }

    return generateFormattedDateString();
}

Um exemplo de resultado: 2023.0708560938