Why aren’t my IG posts not getting likes?

I don’t really care about likes and stuff, but it’s a very noticeable difference. I don’t have a public account, just a personal private one. I posted a pic and it’s been over 5 hours and so far no one has liked it. Not even one. Surely that’s weird right?

Do I have to clear the app of something? Or is it the algorithm?
Why aren’t my IG posts not getting likes?
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