bug identification - What is this round, shiny black bug, about

I found this insect under my shirt while working, it is the first time I ever see something like that and it is kind of too small for me to tell what it is. I do not have a property measuring tool

Some Bugs Walk on Water, but This Talented Beetle Scurries

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Brown Bug and Insect Identification (With Photos) - Dengarden

Tiny barely visible bugs found on/around bed (London, UK) Black/shiny grey oval body, quite quick. Snapped a photo with a phone microscope attachment. Any ideas? : r/whatsthisbug

Yellow and black bug hi-res stock photography and images - Alamy

Types of Small Black Bugs (With Pictures) – Identification

tiny black indoor bugs : r/whatsthisbug

I don't think it's a bed bug, tick, or flea. But I'm high key

Golden Tortoise Beetle

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