Have you seen the pictures I attached ? You can clearly see I can OC the CPU, just don’️t know how far I can go
I'll say it in a way that you can understand.
The 9750H is COMPLETELY multiplier LOCKED upwards. it can NOT be pushed past the max turbo multiplier for that SKU. Period. End of story.
The 9850H *CAN* be overclocked by multiplier partially. Not sure how much, either +3 or +4.
This same restriction applies for the 8750H vs 8850H (which are the 8th gen versions of these chips).
The options you saw in the BIOS (which I"m sure you unlocked by left alt, right control, right shift, f2) are *generic* AMI options that are included as a baseboard. Even my GT73VR Titan has those settings. Your 9th gen laptop simply has a few extra/new settings for the newer chipset. You'll find that a bunch of settings don't even do anything.
In Overclocking Performance Menu->Platform Voltage overrides, there is a setting "DC Loadline Override". This is "Loadline Calibration" in mOhms, which people on desktop boards are used to seeing in "Levels"/"Modes", etc. I have NOT seen this setting hooked up to any register on a laptop. People have tried setting it to 0.1 mOhms and compared it to 2.1 mOhms and there was no difference in temperatures (this is the only way you would know that it is doing something, since there is no vcore sensor in these laptops--they all use "VID"--the override voltage setting changes VID, not vcore, and override voltage is still adaptive mode, therefore Vcore is based only on VID and the AC Loadline value, even on fixed voltage. The DC Loadline (not the same thing as DC Loadline Override) setting in Internal VR Settings will affect the droop on the CPU VID, but vcore is not affected by this option as it's only linked to AC Loadline.