1.6 M impressions in google - 6 six months old website

No advertisement, just wanted to share the update on my project's SEO. I am a developer. I achieved this result on my own by learning how SEO works.

Link to the screenshot: https://frantic-gold-vr1evwd0jd.edgeone.app/3month.png

I am not an expert, so please let me know your opinion. What should be my next focus?

The website is in niche field - related to chess.

Author: Ingodera