Stuck in Bootloop, and Wont Enter Recovery.

ok erase it on iTunes

Connect it to a computer and run iTunes. Then connect the phone and press,

volume up then volume down then press and hold the power button. Keep holding power until connect to iTunes shows. If you get the option to update it, do it

Alternatively

When the screen goes black press and hold power and volume down together for about 8 to 10 seconds, then release power and keep holding power down until iTunes tells you it has detected a iPhone in dfu mode.

Then restore your phone.

It should enter recovery simply plugging in to pc and holding the power button while plugged in if it’s already looping, otherwise, can we have more details, has it been repaired? Do you know what percentage the battery was? Did it drown, drop, etc

A common problem with the iPhone 12s and bootlooping is the front earpiece speaker, if you can, try disconnecting this and see if it fixes your issues! @jackbaldyga