ACF Custom field not showing in Timber Taxonomy page

In your PHP file…

$context['topicTax'] = Timber::get_terms('topic');
Timber::render('my-template.twig', $context);

… is the correct structure. The problem is that WP’s get_terms returns “dumb” objects that don’t have methods for retrieving ACF info. If you still run into issues, verify that those objects are Timber\Terms rather than WP_Term

Also, if you’re looking for the more active forum: StackOverflow is where I normally manage/do support