In this case, you could use gf_advancedpostcreation()->log_debug( 'test' );
That will write to the add-on log if logging is enabled on the Forms > Settings page, and logging for the add-on is enabled on the Forms > Settings > Logging page.
After adding that in and checking the logs, I still don’t see my “test” in the logs. However I do see:
2025-01-06 16:47:42.667896 - DEBUG --> GFFeedAddOn::maybe_process_feed(): Checking for feeds to process for entry #6254 for gravityformsadvancedpostcreation.
2025-01-06 16:47:42.668598 - DEBUG --> GFFeedAddOn::maybe_process_feed(): Adding feed (#2 - Writers' Academy Feed) for entry #6254 for gravityformsadvancedpostcreation to the processing queue.
2025-01-06 16:47:42.789959 - DEBUG --> GF_Feed_Processor::task(): Starting to process feed (#2 - Writers' Academy Feed) for entry #6254 for gravityformsadvancedpostcreation. Attempt number: 1
2025-01-06 16:47:42.817420 - DEBUG --> GF_Advanced_Post_Creation::maybe_handle_post_media(): No files uploaded for field ID 21.
2025-01-06 16:49:22.056804 - DEBUG --> GF_Feed_Processor::task(): attempted feed (#2 - Writers' Academy Feed) for entry #6254 for gravityformsadvancedpostcreation too many times. Bailing.
A cursory Googling suggests that this could be related to an issue with /wp-admin/admin-ajax.php - however there’s no errors in my System Report page. Is there anything else I need to check? Am I even barking up the right tree here?