Are all Purchasing functions supported on mobile devices, or are there any limitations?

Summary:

We are able to access Self Service Procurement from a mobile device without any issues.

However, for other Purchasing areas such as Purchase Orders, Agreements, and Negotiations, we can only access them when navigating from the Welcome page. Once we move to the Home page and check the Navigator menu again, these areas are no longer available.

Could you please confirm whether these Purchasing functions are officially supported on mobile devices? We need them in Redwood style. If they are supported, could you advise why they disappear from the Navigator after navigating to the Home page?

I have attached screenshots for reference.