Setting up SPF/DKIM/DMARC for Google Workspaces is possible. Please see the below Google Support pages - these will help direct you on how to generate and set up SPF, DKIM, and DMARC records:
SPF: https://support.google.com/a/topic/10685331?hl=en&ref_topic=9061731
How do I set up SPF/DKIM/DMARC for Google Workspaces? (my emails are going to spam!)
