how to enable download of free apps without entering apple id

You can’t do anything without an Apple ID account. You can, however, set one up without a payment method.

Create or use your Apple ID without a payment method - Apple Support

Can't be done.

Every download from the App, iTunes, iBook and Mac Stores is logged to your account, so there is no way to download anything, free or for-fee, without using a valid AppleID.