There’s no rule of thumb to follow in terms of the word limit for SEO.
However, longer content is more likely to land on page one on Google. It gives Google more signals to determine your content.
If your pages have more words and they're optimized, the more likely your main keyword will pop up.
With Ubersuggest, a page is considered a low word count if < 200 (lower than 200 words).
Ubersuggest can also only count words with the <head> tag that is in the HTML code. If your content is dynamically loaded, pulled by javascript, or is not in your source code, Ubersuggest will not be able to count it.
However, Google will be able to count words even if they are included in dynamic content. You can safely ignore this issue.
If you have any questions, please reach out via chat or email us at support@ubersuggest.com.