Yoast SEO module
This module was tested on 3rd September 2019, using Drupal 8.7.6 with Site Studio 5.5.4 using version 8.x-1.5 and 8.x-2.0-alpha3 of the module.
There are known issues when using Yoast SEO with Site Studio. Content within the Layout Canvas can't be analysed by Yoast at this time, there is an issue within the Yoast module issue queue to allow for rendered content to be analysed by the library.
Link to the module
The module can be found on Drupal.org here.
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