How do I include topics in Power Automate Viva Engage connector "Post Message V2" OR using Viva Engage API?

Question

In the Viva Engage connector "Post Message V1" it was possible to add topics to the message. With version 2 of the connector it is no longer possible, how can I work by adding topics? Would there be any way via API?

In the API documentation it says here:

"To apply topics to the message provide the topic name(s) in parameters topic1 through topic20."

but it does not work. I tested different ways but the topic array continues to come out as null. Just like this: https://powerusers.microsoft.com/t5/Building-Flows/Topics-are-not-added-to-Viva-Engage-Post-Yammer/td-p/2417468

Old version of Post Message connector: https://learn.microsoft.com/en-us/connectors/yammer/#post-message-[deprecated]

API documentation about applying topics: https://learn.microsoft.com/en-us/rest/api/yammer/messages-json-post#applying-topics