Some programmes deliberately restrict the final spin speed to protect the fabric or maintain the intended result. The maximum speed advertised for the machine is not necessarily available on every setting.
Understanding this situation
A disabled speed choice can therefore be a programme limitation rather than a broken button. Other options may also change which speeds are offered. Compare the combination you selected with the programme table before attempting to reset the washer or repeatedly pressing a control that the programme does not support.
A useful next step
Use the highest speed permitted by both the garment care and the selected programme, rather than forcing a different programme solely for speed. If an option that the manual specifically permits has disappeared, record the full programme and display. A setting restriction is a different enquiry from a washer that accepts a speed but never reaches a normal final spin.
Manuals and supporting guidance
Model-specific instructions take priority. These references support the practical principles discussed here; they do not diagnose your appliance.