The "as far as I know" is not correct.  It's not required to have adjustable video RAM at the hardware level;  in fact, for most integrated video, there is no VRAM to adjust -- it's all shared system memory, which is handled by Windows.

Any software looking for an increase in video RAM needs a system with an AMD or nVidia GPU - unlike the Intel GPU, these do have dedicated video RAM.

We understand each other? I mean all integrated GPUs, not external ones. Integrated have such an option at the hardware level. Whether it is needed or not, and to whom, is a completely different question. There are situations when there is such a need. I need to reserve video memory for my application and this is not a performance issue.

If your system has Intel video plus AMD or nVidia, it has some dedicated video RAM.  If it has Intel video only, it does not.

If the application(s) you're running need dedicated video RAM, it needs a hybrid or discrete GPU.  Such applications will often read the z-buffer (the frame buffer) as video RAM, which cannot be adjusted.  If that's the case, you need  a different (higher end) system on which to run them.

understood thanks

I have both Display device Nvidia and Intel but I don't have VRAM increase options in BIOS though...

Neither memory allocation is adjustable - whatever the system ships with for the nVidia GPU is a hardware limit no setup option can change, and the Intel GPU has no RAM to adjust -- it uses system memory.

So the only way is to buy a video card as a dedicated VRAM for an upgrade, correct?

It's not an option for a notebook, no -- you can't install an internal GPU in any Inspiron system made in well over the last decade.

I have a similar issue

My Dell Inspiron 3505 has 8gb of ram out of which 2.1 gb ram is being used as shared GPU memory, I would like to reduce this to say 512mb or 1gb since I am not a huge gamer
I searched for the option to change the shared GPU memory in the bios but was unable to find the option.
Any help would be appreciated
Thanks

There is no firmware control of the video RAM allocation - you cannot adjust it from setup.

Well Lenovo allows to change the VRAM allocation in their BIOS to 2GB for systems with Ryzen CPUs, e.g. the 5500U, and it is certainly possible to have the same functionality also in Dell BIOS. It is not true that this cannot be changed, Lenovo can so Dell needs to fix the BIOS so that we customers also can change the settings.

It is quite pointless having up to 64GB RAM installed but the integrated Graphics only can use 512MB. This would not make a lot of sense. I have checked what CPU-Z is reporting for the Radeon 5500U and it only sees 512 MB of VRAM. This is not enough VRAM to run intensive GPU related tasks. The BIOS should be unlocked so that the value to assign VRAM can also be changed for Dell notebooks, similar to the Lenovo ones.

I feel this, as I have an inspiron 3501 that I bought with special features, and it cost me well over $1,500 USD. I felt like this was an outrageous price, and I have had nothing but issues! I now see why nobody buys dell. If you are trying to run a successful company, you should make things more user friendly! (Unless, of course, you're Apple, people would pay 10,000,000,000 for the latest Mac). I want you to know, anyone reading this, I have an eight-year-old Acer with 8 gb of ram and a better graphics card than this 2021 inspiron. . TOS76>