Can Facebook promote ChatGPT related services?

yes, you can advertise AI services if your ads follow Facebook's advertising rules and regulation and if you're just starting, use a small budget and add a valid payment method instead of buying an ad account.

You can advertise an AI/API service if it complies with Meta’s ad policies, but don’t buy or rent ad accounts—they can get restricted. For low-cost testing, start with a small daily budget and use an accepted payment method such as a supported debit card or PayPal where available.