She doesn't post me on social media?

I have been dating this girl for about 8 months and we now live together. She posts a bunch on social media and her status is still marked as single. She doesn't post any pictures of us on any of her ig or snap accounts. She told me she's trying to be private because she doesn't want her baby daddy to find out because he is crazy, also when he will come and pick up his kid, she wants me to stay in the house, she does not want us to meet. Is this a red flag?
She doesn't post me on social media?
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