How to know when not to post?

So there’s this TikTok sound that a lot of people post up with there exs. Now I don't know if my ex still has TikTok after the ban since we are in the U. S. I do still have TikTok and I wanted to post to the sound. I made the post but covered his face in any and all pictures of him. I’m tempted to post it but should I refrain from posting it? I don't know if he would be mad if he did in fact have TikTok. And the both of us are not trying to get back together so this would not be an alternative motive. Please let me know your options on if you think he would be mad if he did end up seeing it.
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Also if anyone thinks it’s not a problem to post it should I block him just in case?
How to know when not to post?
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