Further down in that Twitter thread someone posted archive links to some of the actual posts (and not just screenshots), so you can verify this yourself. You can also search archive.ph for "@Kama_Kamilia". For example:

https://archive.is/eAfCV

https://archive.ph/mVvYE

And yes, this is the NAFO founder's Twitter account, as mentioned here in this glowing article about NAFO in Politico:

https://www.politico.eu/article/nafo-doge-shiba-russia-putin-ukraine-twitter-trolling-social-media-meme/

The NAFO summit from July this year was live streamed, you can see him on stage if look for a recording. The Estonian PM joined this event via video call, btw.