Is the system suffering from thermal shutdowns? Is this problem something that has happened only recently? You mentioned "if I am right, so how are you monitoring temps? Have you tried cleaning the fan and heat sink assembly?  Run diagnostics, F12 at boot, and watch for any problems with the CPU fan.

I bet its the GPU that worked fine untill DELL updated the BIOS

There was a windows update only, for me.

I'm sure it is around 90C, I was just not sure about the model of the laptop (idk how though), so, I noticed that it suddenly rose to 85-90C when I plugged the ac or whatever it is called, and after I unplugged it, it dropped to 50-60C, no shutdowns, I cleaned the fan, using amd adrenaline edition and Alienware command center, happening only recently.

So 92C is around 200f

Well there are quite a few reasons why your processor might be overheating.

It could be lack of thermal paste, insufficient cooling , improper airflow, bottle-necking due to mismatching components and so on.

1. You could try and change the thermal paste applied on your cpu.
2. Check to see if your processor and GPU are compatible so your cpu doesn’t get overworked during a task.
3. Change the type of cooler you use for your cpu. Stock coolers are almost never a good option so its a better option to get a air cooler or even a liquid cooler if your cpu is really top of the line.
4. Make sure your cabinet is placed in a place with plenty of space for air to circulate. Keeping it in a corner would restrict airflow which would cause overheating.

These are the only things i can think of which will help you with your problem. Try them out and hopefully you’ll get results!