Read this support article about UK age verification: https://support.apple.com/126788
Accepted ID forms are:
Passport,
Driver's license
One of the following PASS-accredited Proof of Age cards:
CitizenCard
My ID Card
TOTUM ID card
Young Scot National Entitlement Card
Apple also says “If you already have an Apple Account, Apple will check if you have a credit card on file or other eligible methods available to confirm that you're 18 or older].” This has been interpreted to indicate that if you have have had your Apple Account for 18 years or longer, this would be sufficient indication of your minimum age.
Debit cards and gift cards aren't supported.
Additional reading:
More about the UK —> https://discussions.apple.com/thread/256294620?answerId=261943146022#261943146022
Community threads outlining age verification in the UK and ID recognition troubleshooting tips:
https://discussions.apple.com/thread/256270869?sortBy=oldest_first
https://discussions.apple.com/thread/256269077?sortBy=oldest_first
This thread specifically discusses UK permitted IDs and an additional method based on age of the Apple Account. —> https://discussions.apple.com/thread/256295154
As an aside, if you reside in Bangladesh but are using a UK based Apple Account, you are violating Apple's terms of use, with inherent consequences.
Apple Media Services Terms and Conditions
https://www.apple.com/legal/internet-services/itunes/us/terms.html
- A. ”Our Services are available for your use in your country of residence (“Home Country”). By creating an account for use of the Services in a particular country or territory you are specifying it as your Home Country.
and
https://www.apple.com/legal/internet-services/icloud/en/terms.html#:~:text=E%2E,-Termination
VII B. Termination by Apple
“Apple may at any time, under certain circumstances and without prior notice, immediately terminate or suspend all or a portion of your Account and/or access to the Service. Cause for such termination shall include: (a) violations of this Agreement or any other policies or guidelines that are referenced herein and/or posted on the Service;”