You say that the BionicMobileAssistant is a sub-category of the Festo Bionic Handling Assistant, but autonomous mobility changes the entire usage paradigm.
A robotic arm like Festo, although sophisticated, remains a mainly stationary tool, excellent for precise manipulation in a laboratory or fixed chain.
The BionicMobileAssistant, with its ability to move and interact in a dynamic environment, must handle constant unforeseen events, like a misplaced package or a passing employee, which is a different operational complexity.
It's like saying that an autonomous car is just a faster variant of a crane arm; the safety rules and practical considerations diverge too much to group them so simply.