Is it obligatory to inform a suitor that I have been married twice and divorced both times, knowing that he is aware I am divorced and not a virgin, and he has not asked for details?

You are not legally obligated to inform the suitor that you have been married twice. There is no Sharia evidence that mandates this, and a woman having been previously married is not a defect.

If the suitor asks you in the future, then inform him about the magic of separation.

Maintain your spiritual protection by fulfilling your religious obligations, avoiding sins, and frequently reciting the Quran and engaging in remembrance (dhikr), for this is a strong fortress against devils.

If the man is pious and of good character, then agree to marry him, for Islamic law encourages marriage to those whose character and religiosity you approve of.

Among the foundations for a successful marriage is each spouse fulfilling their duties towards the other.