See https://www.googlecloudcommunity.com/gc/custom/page/page-id/Workspace-Feature-Ideas-FAQ for how to get access.
If you are submitting a feature idea, be sure to explain the problem that you're trying to solve with the feature idea, not just the idea itself. For example, saying "when my users are trying to do 'A', they often get confused by the fact that the buttons to do 'X' and to do 'Y' look quite similar to each other, which leads to this unintended consequence" is far more likely to get fixed than a feature idea that just says "change the color of the button 'Y'".
Cheers,
Ian
LinkedIn
Twitter
