Is it a red flag that my boyfriend hides me online and from his Muslim family?

So we been dating for like 7 months now. It's going very well, I met some of his friends too, his colleagues know me too etc. Everything is fantastic. However my boyfriend doesn't post at all on his Instagram/social media, like.. crickets, not even 1 story or post he have nothing (not saying its bad by the way) and only uses instagram to watch reels/posts etc. I just want to know if that is a "red flag" as this is going pretty serious and i just dont want my man to seem or act "single" if it makes sense...

And also.. he says he is afraid for me to meet his family because they are Muslim and he is afraid they gonna judge me.. I also don't know what to say about that too.

Let me know ur thoughts! Thank you.
Is it a red flag that my boyfriend hides me online and from his Muslim family?
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