Welcome to The Forum!

Thank You for the pics!!

It looks like something 'heaved' the upright in the pic, but I can't think of what might do that.

Can you remove the gravel from around it and take another pic or 2? FWIW, it doesn't look like any catastrophic damage was done ... but getting that post back down might be a bit of work.

I'm sorry that I can't guarantee that I'll be here every day, but I'll keep an eye out for your response.