Need advise

A rishta has come for my sister. The man is 33 years old but looks older. He has 6 siblings and lives in a foreign country. However, I can't seem to find any Instagram, LinkedIn, or Facebook account for him. I suspect he might be hiding something, and I am scared that he may have been previously married. The boy seems to be very conservative despite having lived in a foreign country his whole life. My mother likes the rishta, but I don't. I don't know, there is just a bad vibe, and his younger brother is married while he is not, despite being the eldest. Do you think it is common to not have any social media account? Also, I can't find anything related to his siblings.