SP/Propel - Force users to check out one item at a time - "Restrict request to single item"

Is it possible to make users check out only one item at a time in SMSP/Propel? As far as I can tell, the "Restrict request to single item" functionality in HPE SM does not seem to be synched/aggregated to Service Portal.

A customer has some items which should only be ordered alone, and not as multiples. How can this be solved?