The latest 8.x.-1.29 version of Search API module stated as Drupal 10 compatible but Drupal 10 upgrade status module warns 7 errors.
There is an issue, where 6 of the errors are reported, so I don't do this again.
https://www.drupal.org/project/search_api/issues/3362061
🐛
Call to deprecated method stopPropagation and isPropagationStopped
Postponed: needs info
This is the 7th error on our site:
search_api/src/Processor/FieldsProcessorPluginBase.php (Line 234)
The "#pre_render" render array value expects an array of callbacks.
Closed: works as designed
1.29
Plugins
A quick look into the code suggest that the value is an array of callbacks and the Upgrade Status module just fails to correctly identify its type.