Time to get a new TPM. Any TPM worth their salt should be doing everything in their power to catalog and mitigate those risks, and communicate them upwards. Lack of communication in both directions and adversarial conversations with engineers is a whole parade of red flags.

That said, Gantt charts absolutely have their place alongside Agile. Our budget and goals are set yearly so inevitably there’s going to be milestones and work back dates to meet, as well as cross-team/org dependencies to track.