Gatsby cloud and strapi

Using Strapi deployed to Render and Gatsby deployed via Gatsby Cloud.

Fairly small marketing site < 20 pages. Trying to work out how to get incremental builds sorted. At the moment just a change to a title is still taking close to a minute.

Is there any special set up I need to get Strapi working with incremental builds?

I am toying with updating to Gatsby V3 but I can’t find info on whether the Strapi source plugin is ready for that yet?

Any advice greatly appreciated.