Quality is not an act, it is a habit built on accountability
Some believe quality is an act. That you perform a quality review as a phase within a project.
In reality, quality is a habit. It is built overtime by applying knowledge, utilizing frameworks, engaging in discourse, researching analogs and working as team to hold each other accountable.
That last part, accountability, is key. If you cannot hold one another accountable, then your team it is doomed. Accountability is the crucial emotional pull that builds quality because it brings gravitas and scrutiny to every decision. It centers the team on delivering excellence together.