When looking at this comment, it appears as though there is no scientific source to back up this claim, and that it is indeed false. The original author cited a Reddit post, which is notorious for being untrustworthy and not fact-checked. The original post of the website seems to come from a comments section from a social media platform, not from a credible or reputable website or scientific journal.
However, if you do a wider search for scholarly sources on this topic, you will find that this claim is, in fact, false. The reputable source Perlan.is states that "Climate change does not directly affect the Northern Lights or Aurora Borealis. Auroras occur in the Earth’s upper atmosphere, far beyond the layers impacted by climate change" and "Northern lights, also known as auroras, are a natural phenomenon caused by solar winds. These winds push electrically charged particles, such as electrons, into atoms and molecules in Earth's upper atmosphere, producing the vibrant light displays we see. While solar activity, which drives the northern lights, is not influenced by climate change, other factors like cloud cover and weather patterns can affect the ability to view them." The person who made the original claim may have gotten these two facts confused while making their statement.
When exploring this source, I discovered that Perlan is a tourist center based in Reykjavik, Iceland. I was unable to find where they were exactly sourcing their information for the article they had published, though I was able to explore the site more. I learned that they are an honored member of Festa, which is a global center for sustainability whose goal is to "have an enriching impact on the environment and society. Festa - Center for Sustainability is a non-governmental organization whose sole interest is sustainability." While it is not a direct quote, it does show where they are basing their information off of, and provides a level of trustworthiness and education to the information found on Perlan.is. Their ethos is strong and well-labeled throughout this article and website. You can also book tours of Iceland and read in-depth articles about the northern lights (aurora borealis) and further educate yourself on all aspects of it.
I did a deep dive on Festa and learned about some of the work that they have done. They have been a "leader in the field of sustainability in Icelandic business since 2011", they are "a bridge builder and guiding light when it comes to increasing knowledge about the sustainability of companies, institutions, and all kinds of organizations", and they raise "awareness in society and encourage collaboration and action in this field. Festa connects different parties: companies, municipalities, institutions, and individuals who want to be leaders in the field of sustainability." All of this information is publicly available on their website and can be proven with a quick Google search, as well as their board of directors and advocates. All of their member associations are also listed out with each name and the year they were associated with.
Even though it is not scientifically proven that climate change directly affects the aurora borealis, there are definitely certain aspects of it that it can interfere with, such as how much you can see them and when. They aren't going anywhere anytime soon, and that is a fact. The point of Reddit sometimes is to be provocative or misleading, and this can result in the spread of misinformation. This confusion can create unwanted panic and fear, which is why you should never blindly trust it as your main source without doing your own research.
https://www.sjalfbaer.is/festa
https://perlan.is/articles/northern-lights-iceland-months