I worked at a company that had built a tool for basically this. You can deploy your service changes into prod, get a special cookie and url that you could share

I worked at a company that had built a tool for basically this. You can deploy your service changes into prod, get a special cookie and url that you could share with other users, and see prod with your changes. It was super helpful, but it did bias toward manual QA in a conference room rather than FE automated testing.