I just found these images from ddg image search “dual sim”.
The first picture, a Samsung graphic is showing dual sim capabilities by indicating sim1 as a house icon in the system area icons and sim2 is a building.

The second picture is showing a square with a “1” in it. This may be your unknown icon.

edit: i just noticed that your icon is next to the clock (left side - App side). So it could be just a regular app also.

Dont forget to rule out dual sim phones; indicating sim 1 is active.

The Google Nearby feature thing (Google’s coming version of Apple Air Tags) will require a constant background Bluetooth scanner to listen for the tags.

My opinion: that stays off. Looking for your lost phone, luggage, or ex-wife? Im not going to help you if i dont know you. Buy a new item, take better care of it.

Mine, I add some unicode emojis to make it look nice.
First line for weather details.
Then a blank space, or for alerts if any.
And a calendar line.
💧$ch$ 🧭$cps$ 🌎$l$ @ $ut$
$enter$
⚠️ $als$
$enter$
📆$d$ , 2024 $w$

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My favorite acronym is the ol’ TWAIN flatbed scanners… Technology Without An Interesting Name!