Intel i5-8400H CPU Getting Thermal Throttled

Hello Dell community, CPU temperatures are getting very high while charging, temps are reaches above 95C, when I'm just browsing, temps shouldn't reach that high while browsing. However, temperature remains normal on battery mode, but performance decreases a lot. I have cleaned fan vents and applied new thermal paste but no improvement. Just to let you know, GPU temps are normal. CPU and GPU are connected with same heat sink with fan. My point is, if there was any problem with fan or ventilation then why GPU temperatures are not getting higher like CPU?

CPU Temperatures while Charging:

CPU Temperatures on Battery mode:

My Laptop's specs,

OS Name: Microsoft Windows 11 Pro
Version: 10.0.22631 Build 22631
OS Manufacturer: Microsoft Corporation
System Manufacturer: Dell Inc.
System Model: Latitude 5491
System Type: x64-based PC
System SKU: 0818
Processor: Intel(R) Core(TM) i5-8400H CPU @ 2.50GHz, 2496 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date: Dell Inc. 1.32.0, 1/28/2024
SMBIOS Version: 3.1
Embedded Controller Version: 255.255
BIOS Mode: UEFI
BaseBoard Manufacturer: Dell Inc.
BaseBoard Product: 0VK7YF
BaseBoard Version: A00

Kindly help me with this issue, if you need any other information, let me know. Thank You so much.