AWS Marketplace SNS topic

Hello, I have a question about AWS Marketplace SNS topics, that provide notifications regarding customer contract/subscription state (https://docs.aws.amazon.com/marketplace/latest/userguide/saas-notification.html).

The documentation mentions only one way of subscribing to these specific topics, which is by using Amazon SQS service. I would like to know is it possible to subscribe an HTTPs endpoint to these two specific topics?

I've found information that mentioned topics don't belong to my AWS account, therefore I can't directly subscribe anything than SQS endpoint to them (https://repost.aws/questions/QUdc6YAINxS8qKVzrfMcI1Mg/aws-marketplace-saas-product-integration-testing-sns-subscriptions).

I'm not asking about standard Amazon SNS topics, I am aware that it is possible to subscribe to them using an HTTPs endpoint.

I apologize for asking the same question again, but I did not receive an answer to my previous inquiry.

Thank you for your help and time! FraBek