It does have a TPM 2.0 chip and the Intel ME until Alienware and Dell released the 1.4.4 bios update which broke both with no repair for a year.
Dell released a 1.6.1 bios update which doesn’t fix either as my device manager shows a fault with TPM 2.0 (code 10) and my Intel ME is showing as unknown.
Tried ringing UK Dell support and they denied bios 1.4.4 ever existed. It’s been nearly a year so don’t expect it to be fixed anytime soon.
it would be great to hear an official response on how to repair though for those out of warranty.
to be sure yours has tpm, just hit F2 on boot screen and look for the TPM option on the bios settings. If it’s there, it has it.
I have a Alienware m15 with Windows 10 Pro which I'm using bitlocker and it does not require a password.
In the Windows settings there is also TPM settings.
According to Microsoft website all PC’s and Laptops since 2016 MUST have TPM on the device to be compatible with the Windows 10 guidelines
Since the M15 is a newer device then you would like to think that Dell have followed the minimum guidelines for a Windows 10 computer.
My laptop is the Alienware 13 R2 so it’s not the same but I did look into the issue online for the person asking the question. My Laptop doesn’t have TPM anymore since the 1.4.4 bios update as Dell issued a badly tested Bios and still have not fixed computers they broke.
Maybe a Dell moderator would confirm the TPM on the M15 but I would say yes as Microsoft do say it’s a requirement.