How do you push development when you do not have the explicit support of the rest of the team?

"I interviewed for Software Engineer, Machine Learning at the L5 level. My process was a recruiter screen, an online coding assessment, one live coding round, a second recruiter debrief call, and then a final virtual onsite with three coding interviews, one behavioral, and one system design round. The coding rounds were mostly classic algorithm questions, while the system design was a recommendation system for ranking locations in a feed for someone visiting a new city. I actually felt better about the process than I expected because the interviewers seemed more lenient in how they graded me than I would have graded myself."