You don’t need to open a bank account to get a prepaid debit card.

Which reloadable debit cards have no KYC requirements?

This is highly country dependent. Anonymous prepaid cards aren't as widely available as you might think, and often they have very high user-paid fees.

The amount of money you can load or receive into a debit card is limited without doing enough KYC overhead you could have gotten a bank account with the same effort.

If you try automating bots to do KYC for debit cards what you'll be doing is basically looking like a money launderer and get all your accounts shut down.