Here’s our site built on bubble: It’s a simple food blog with about 400+ vegetarian recipes, some contributed by the community, but a majority of the content is written by us.
We get about 50k page views every month primarily from Google Search (About 75%) and remaining from Pinterest, Facebook, etc.
Bubble does provide various ways to manage and optimise for SEO (dynamic sitemaps, SEO metadata, keywords, etc). But there are still quite a lot of external factors like backlinks, authority, content, etc that will ultimately determine whether you succeed or not.
In my experience, the only significant challenge with Bubble and SEO is that the whole platform is Javascript based, which makes it resource intensive for the GoogleBot to render and then index content. Even though bubble use pre-rendering solutions at the backend, it would take some time for your content to be initially discovered (for a new site). Google’s way of crawling a Javascript site is improved significantly in the last couple of years, but it would always trail a standard HTML + CSS based static site.
Out site is live for several years, and if we post a new recipe now, it is indexed within a few hours or a day. Whether it ranks on Page 1 of Google, is a complete different question.
Hope this helps.