End users not seeing the option "Select Brand" from PowerPoint Copilot

Hi, I am having similar issues. One thing that is working is if colleagues open the Copilot app and go to "Create" (either on the left hand menu, or click on the square of squares/app launcher to see the create option) and then above the prompt section, select "Design a Banner" or "Design a Poster". Some of these create options allow you to select a "brand" or "style" in the box where you write the prompt. When you click on "brand" or "style", the official brand kit appears as one of the options the user can select. This works for everyone in my organisation, so my brand kit is clearly published but I also can't see an option to select a brand in PowerPoint or Word. And weirdly, even in the "Create" section of Copilot, if you select "create a presentation", it doesn't show our presentation template. However, if you go to "more" in the "Create" section, and select "brand kits" or "brand templates", everyone can access our company kit from there. Very odd and not very intuitive!