Looking outside of your company, the first group that I would turn to would be friends and family.

Oftentimes, you just need someone to bounce ideas off.

It could be that you have some rough sketches or wire frames that you want to run somebody through. You may have a clickable prototype or some high fidelity Figma designs.

Regardless friends and family can be a great source of design feedback.

Whatever you do, just make sure you take notes and share them with your team.

In my experience, leveraging friends and family can bring about a diverse set of opinions and this can be helpful in narrowing in on the best design for a particular problem.